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Email.php
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<?php /** * CodeIgniter * * An open source application development framework for PHP * * This content is released under the MIT License (MIT) * * Copyright (c) 2014 - 2017, British Columbia Institute of Technology * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * * @package CodeIgniter * @author EllisLab Dev Team * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/) * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/) * @license http://opensource.org/licenses/MIT MIT License * @link https://codeigniter.com * @since Version 1.0.0 * @filesource */ defined('BASEPATH') OR exit('No direct script access allowed'); /** * CodeIgniter Email Class * * Permits email to be sent using Mail, Sendmail, or SMTP. * * @package CodeIgniter * @subpackage Libraries * @category Libraries * @author EllisLab Dev Team * @link https://codeigniter.com/user_guide/libraries/email.html */ class CI_Email { /** * Used as the User-Agent and X-Mailer headers' value. * * @var string */ public $useragent = 'CodeIgniter'; /** * Path to the Sendmail binary. * * @var string */ public $mailpath = '/usr/sbin/sendmail'; // Sendmail path /** * Which method to use for sending e-mails. * * @var string 'mail', 'sendmail' or 'smtp' */ public $protocol = 'mail'; // mail/sendmail/smtp /** * STMP Server host * * @var string */ public $smtp_host = ''; /** * SMTP Username * * @var string */ public $smtp_user = ''; /** * SMTP Password * * @var string */ public $smtp_pass = ''; /** * SMTP Server port * * @var int */ public $smtp_port = 25; /** * SMTP connection timeout in seconds * * @var int */ public $smtp_timeout = 5; /** * SMTP persistent connection * * @var bool */ public $smtp_keepalive = FALSE; /** * SMTP Encryption * * @var string empty, 'tls' or 'ssl' */ public $smtp_crypto = ''; /** * Whether to apply word-wrapping to the message body. * * @var bool */ public $wordwrap = TRUE; /** * Number of characters to wrap at. * * @see CI_Email::$wordwrap * @var int */ public $wrapchars = 76; /** * Message format. * * @var string 'text' or 'html' */ public $mailtype = 'text'; /** * Character set (default: utf-8) * * @var string */ public $charset = 'UTF-8'; /** * Alternative message (for HTML messages only) * * @var string */ public $alt_message = ''; /** * Whether to validate e-mail addresses. * * @var bool */ public $validate = FALSE; /** * X-Priority header value. * * @var int 1-5 */ public $priority = 3; // Default priority (1 - 5) /** * Newline character sequence. * Use "\r\n" to comply with RFC 822. * * @link http://www.ietf.org/rfc/rfc822.txt * @var string "\r\n" or "\n" */ public $newline = "\n"; // Default newline. "\r\n" or "\n" (Use "\r\n" to comply with RFC 822) /** * CRLF character sequence * * RFC 2045 specifies that for 'quoted-printable' encoding, * "\r\n" must be used. However, it appears that some servers * (even on the receiving end) don't handle it properly and * switching to "\n", while improper, is the only solution * that seems to work for all environments. * * @link http://www.ietf.org/rfc/rfc822.txt * @var string */ public $crlf = "\n"; /** * Whether to use Delivery Status Notification. * * @var bool */ public $dsn = FALSE; /** * Whether to send multipart alternatives. * Yahoo! doesn't seem to like these. * * @var bool */ public $send_multipart = TRUE; /** * Whether to send messages to BCC recipients in batches. * * @var bool */ public $bcc_batch_mode = FALSE; /** * BCC Batch max number size. * * @see CI_Email::$bcc_batch_mode * @var int */ public $bcc_batch_size = 200; // -------------------------------------------------------------------- /** * Whether PHP is running in safe mode. Initialized by the class constructor. * * @var bool */ protected $_safe_mode = FALSE; /** * Subject header * * @var string */ protected $_subject = ''; /** * Message body * * @var string */ protected $_body = ''; /** * Final message body to be sent. * * @var string */ protected $_finalbody = ''; /** * Final headers to send * * @var string */ protected $_header_str = ''; /** * SMTP Connection socket placeholder * * @var resource */ protected $_smtp_connect = ''; /** * Mail encoding * * @var string '8bit' or '7bit' */ protected $_encoding = '8bit'; /** * Whether to perform SMTP authentication * * @var bool */ protected $_smtp_auth = FALSE; /** * Whether to send a Reply-To header * * @var bool */ protected $_replyto_flag = FALSE; /** * Debug messages * * @see CI_Email::print_debugger() * @var string */ protected $_debug_msg = array(); /** * Recipients * * @var string[] */ protected $_recipients = array(); /** * CC Recipients * * @var string[] */ protected $_cc_array = array(); /** * BCC Recipients * * @var string[] */ protected $_bcc_array = array(); /** * Message headers * * @var string[] */ protected $_headers = array(); /** * Attachment data * * @var array */ protected $_attachments = array(); /** * Valid $protocol values * * @see CI_Email::$protocol * @var string[] */ protected $_protocols = array('mail', 'sendmail', 'smtp'); /** * Base charsets * * Character sets valid for 7-bit encoding, * excluding language suffix. * * @var string[] */ protected $_base_charsets = array('us-ascii', 'iso-2022-'); /** * Bit depths * * Valid mail encodings * * @see CI_Email::$_encoding * @var string[] */ protected $_bit_depths = array('7bit', '8bit'); /** * $priority translations * * Actual values to send with the X-Priority header * * @var string[] */ protected $_priorities = array( 1 => '1 (Highest)', 2 => '2 (High)', 3 => '3 (Normal)', 4 => '4 (Low)', 5 => '5 (Lowest)' ); /** * mbstring.func_override flag * * @var bool */ protected static $func_override; // -------------------------------------------------------------------- /** * Constructor - Sets Email Preferences * * The constructor can be passed an array of config values * * @param array $config = array() * @return void */ public function __construct(array $config = array()) { $this->charset = config_item('charset'); $this->initialize($config); $this->_safe_mode = ( ! is_php('5.4') && ini_get('safe_mode')); isset(self::$func_override) OR self::$func_override = (extension_loaded('mbstring') && ini_get('mbstring.func_override')); log_message('info', 'Email Class Initialized'); } // -------------------------------------------------------------------- /** * Initialize preferences * * @param array $config * @return CI_Email */ public function initialize(array $config = array()) { $this->clear(); foreach ($config as $key => $val) { if (isset($this->$key)) { $method = 'set_'.$key; if (method_exists($this, $method)) { $this->$method($val); } else { $this->$key = $val; } } } $this->charset = strtoupper($this->charset); $this->_smtp_auth = isset($this->smtp_user[0], $this->smtp_pass[0]); return $this; } // -------------------------------------------------------------------- /** * Initialize the Email Data * * @param bool * @return CI_Email */ public function clear($clear_attachments = FALSE) { $this->_subject = ''; $this->_body = ''; $this->_finalbody = ''; $this->_header_str = ''; $this->_replyto_flag = FALSE; $this->_recipients = array(); $this->_cc_array = array(); $this->_bcc_array = array(); $this->_headers = array(); $this->_debug_msg = array(); $this->set_header('Date', $this->_set_date()); if ($clear_attachments !== FALSE) { $this->_attachments = array(); } return $this; } // -------------------------------------------------------------------- /** * Set FROM * * @param string $from * @param string $name * @param string $return_path = NULL Return-Path * @return CI_Email */ public function from($from, $name = '', $return_path = NULL) { if (preg_match('/\<(.*)\>/', $from, $match)) { $from = $match[1]; } if ($this->validate) { $this->validate_email($this->_str_to_array($from)); if ($return_path) { $this->validate_email($this->_str_to_array($return_path)); } } // prepare the display name if ($name !== '') { // only use Q encoding if there are characters that would require it if ( ! preg_match('/[\200-\377]/', $name)) { // add slashes for non-printing characters, slashes, and double quotes, and surround it in double quotes $name = '"'.addcslashes($name, "\0..\37\177'\"\\").'"'; } else { $name = $this->_prep_q_encoding($name); } } $this->set_header('From', $name.' <'.$from.'>'); isset($return_path) OR $return_path = $from; $this->set_header('Return-Path', '<'.$return_path.'>'); return $this; } // -------------------------------------------------------------------- /** * Set Reply-to * * @param string * @param string * @return CI_Email */ public function reply_to($replyto, $name = '') { if (preg_match('/\<(.*)\>/', $replyto, $match)) { $replyto = $match[1]; } if ($this->validate) { $this->validate_email($this->_str_to_array($replyto)); } if ($name !== '') { // only use Q encoding if there are characters that would require it if ( ! preg_match('/[\200-\377]/', $name)) { // add slashes for non-printing characters, slashes, and double quotes, and surround it in double quotes $name = '"'.addcslashes($name, "\0..\37\177'\"\\").'"'; } else { $name = $this->_prep_q_encoding($name); } } $this->set_header('Reply-To', $name.' <'.$replyto.'>'); $this->_replyto_flag = TRUE; return $this; } // -------------------------------------------------------------------- /** * Set Recipients * * @param string * @return CI_Email */ public function to($to) { $to = $this->_str_to_array($to); $to = $this->clean_email($to); if ($this->validate) { $this->validate_email($to); } if ($this->_get_protocol() !== 'mail') { $this->set_header('To', implode(', ', $to)); } $this->_recipients = $to; return $this; } // -------------------------------------------------------------------- /** * Set CC * * @param string * @return CI_Email */ public function cc($cc) { $cc = $this->clean_email($this->_str_to_array($cc)); if ($this->validate) { $this->validate_email($cc); } $this->set_header('Cc', implode(', ', $cc)); if ($this->_get_protocol() === 'smtp') { $this->_cc_array = $cc; } return $this; } // -------------------------------------------------------------------- /** * Set BCC * * @param string * @param string * @return CI_Email */ public function bcc($bcc, $limit = '') { if ($limit !== '' && is_numeric($limit)) { $this->bcc_batch_mode = TRUE; $this->bcc_batch_size = $limit; } $bcc = $this->clean_email($this->_str_to_array($bcc)); if ($this->validate) { $this->validate_email($bcc); } if ($this->_get_protocol() === 'smtp' OR ($this->bcc_batch_mode && count($bcc) > $this->bcc_batch_size)) { $this->_bcc_array = $bcc; } else { $this->set_header('Bcc', implode(', ', $bcc)); } return $this; } // -------------------------------------------------------------------- /** * Set Email Subject * * @param string * @return CI_Email */ public function subject($subject) { $subject = $this->_prep_q_encoding($subject); $this->set_header('Subject', $subject); return $this; } // -------------------------------------------------------------------- /** * Set Body * * @param string * @return CI_Email */ public function message($body) { $this->_body = rtrim(str_replace("\r", '', $body)); /* strip slashes only if magic quotes is ON if we do it with magic quotes OFF, it strips real, user-inputted chars. NOTE: In PHP 5.4 get_magic_quotes_gpc() will always return 0 and it will probably not exist in future versions at all. */ if ( ! is_php('5.4') && get_magic_quotes_gpc()) { $this->_body = stripslashes($this->_body); } return $this; } // -------------------------------------------------------------------- /** * Assign file attachments * * @param string $file Can be local path, URL or buffered content * @param string $disposition = 'attachment' * @param string $newname = NULL * @param string $mime = '' * @return CI_Email */ public function attach($file, $disposition = '', $newname = NULL, $mime = '') { if ($mime === '') { if (strpos($file, '://') === FALSE && ! file_exists($file)) { $this->_set_error_message('lang:email_attachment_missing', $file); return FALSE; } if ( ! $fp = @fopen($file, 'rb')) { $this->_set_error_message('lang:email_attachment_unreadable', $file); return FALSE; } $file_content = stream_get_contents($fp); $mime = $this->_mime_types(pathinfo($file, PATHINFO_EXTENSION)); fclose($fp); } else { $file_content =& $file; // buffered file } $this->_attachments[] = array( 'name' => array($file, $newname), 'disposition' => empty($disposition) ? 'attachment' : $disposition, // Can also be 'inline' Not sure if it matters 'type' => $mime, 'content' => chunk_split(base64_encode($file_content)), 'multipart' => 'mixed' ); return $this; } // -------------------------------------------------------------------- /** * Set and return attachment Content-ID * * Useful for attached inline pictures * * @param string $filename * @return string */ public function attachment_cid($filename) { for ($i = 0, $c = count($this->_attachments); $i < $c; $i++) { if ($this->_attachments[$i]['name'][0] === $filename) { $this->_attachments[$i]['multipart'] = 'related'; $this->_attachments[$i]['cid'] = uniqid(basename($this->_attachments[$i]['name'][0]).'@'); return $this->_attachments[$i]['cid']; } } return FALSE; } // -------------------------------------------------------------------- /** * Add a Header Item * * @param string * @param string * @return CI_Email */ public function set_header($header, $value) { $this->_headers[$header] = str_replace(array("\n", "\r"), '', $value); return $this; } // -------------------------------------------------------------------- /** * Convert a String to an Array * * @param string * @return array */ protected function _str_to_array($email) { if ( ! is_array($email)) { return (strpos($email, ',') !== FALSE) ? preg_split('/[\s,]/', $email, -1, PREG_SPLIT_NO_EMPTY) : (array) trim($email); } return $email; } // -------------------------------------------------------------------- /** * Set Multipart Value * * @param string * @return CI_Email */ public function set_alt_message($str) { $this->alt_message = (string) $str; return $this; } // -------------------------------------------------------------------- /** * Set Mailtype * * @param string * @return CI_Email */ public function set_mailtype($type = 'text') { $this->mailtype = ($type === 'html') ? 'html' : 'text'; return $this; } // -------------------------------------------------------------------- /** * Set Wordwrap * * @param bool * @return CI_Email */ public function set_wordwrap($wordwrap = TRUE) { $this->wordwrap = (bool) $wordwrap; return $this; } // -------------------------------------------------------------------- /** * Set Protocol * * @param string * @return CI_Email */ public function set_protocol($protocol = 'mail') { $this->protocol = in_array($protocol, $this->_protocols, TRUE) ? strtolower($protocol) : 'mail'; return $this; } // -------------------------------------------------------------------- /** * Set Priority * * @param int * @return CI_Email */ public function set_priority($n = 3) { $this->priority = preg_match('/^[1-5]$/', $n) ? (int) $n : 3; return $this; } // -------------------------------------------------------------------- /** * Set Newline Character * * @param string * @return CI_Email */ public function set_newline($newline = "\n") { $this->newline = in_array($newline, array("\n", "\r\n", "\r")) ? $newline : "\n"; return $this; } // -------------------------------------------------------------------- /** * Set CRLF * * @param string * @return CI_Email */ public function set_crlf($crlf = "\n") { $this->crlf = ($crlf !== "\n" && $crlf !== "\r\n" && $crlf !== "\r") ? "\n" : $crlf; return $this; } // -------------------------------------------------------------------- /** * Get the Message ID * * @return string */ protected function _get_message_id() { $from = str_replace(array('>', '<'), '', $this->_headers['Return-Path']); return '<'.uniqid('').strstr($from, '@').'>'; } // -------------------------------------------------------------------- /** * Get Mail Protocol * * @param bool * @return mixed */ protected function _get_protocol($return = TRUE) { $this->protocol = strtolower($this->protocol); in_array($this->protocol, $this->_protocols, TRUE) OR $this->protocol = 'mail'; if ($return === TRUE) { return $this->protocol; } } // -------------------------------------------------------------------- /** * Get Mail Encoding * * @param bool * @return string */ protected function _get_encoding($return = TRUE) { in_array($this->_encoding, $this->_bit_depths) OR $this->_encoding = '8bit'; foreach ($this->_base_charsets as $charset) { if (strpos($charset, $this->charset) === 0) { $this->_encoding = '7bit'; } } if ($return === TRUE) { return $this->_encoding; } } // -------------------------------------------------------------------- /** * Get content type (text/html/attachment) * * @return string */ protected function _get_content_type() { if ($this->mailtype === 'html') { return empty($this->_attachments) ? 'html' : 'html-attach'; } elseif ($this->mailtype === 'text' && ! empty($this->_attachments)) { return 'plain-attach'; } else { return 'plain'; } } // -------------------------------------------------------------------- /** * Set RFC 822 Date * * @return string */ protected function _set_date() { $timezone = date('Z'); $operator = ($timezone[0] === '-') ? '-' : '+'; $timezone = abs($timezone); $timezone = floor($timezone/3600) * 100 + ($timezone % 3600) / 60; return sprintf('%s %s%04d', date('D, j M Y H:i:s'), $operator, $timezone); } // -------------------------------------------------------------------- /** * Mime message * * @return string */ protected function _get_mime_message() { return 'This is a multi-part message in MIME format.'.$this->newline.'Your email application may not support this format.'; } // -------------------------------------------------------------------- /** * Validate Email Address * * @param string * @return bool */ public function validate_email($email) { if ( ! is_array($email)) { $this->_set_error_message('lang:email_must_be_array'); return FALSE; } foreach ($email as $val) { if ( ! $this->valid_email($val)) { $this->_set_error_message('lang:email_invalid_address', $val); return FALSE; } } return TRUE; } // -------------------------------------------------------------------- /** * Email Validation * * @param string * @return bool */ public function valid_email($email) { if (function_exists('idn_to_ascii') && $atpos = strpos($email, '@')) { $email = self::substr($email, 0, ++$atpos).idn_to_ascii(self::substr($email, $atpos)); } return (bool) filter_var($email, FILTER_VALIDATE_EMAIL); } // -------------------------------------------------------------------- /** * Clean Extended Email Address: Joe Smith <joe@smith.com> * * @param string * @return string */ public function clean_email($email) { if ( ! is_array($email)) { return preg_match('/\<(.*)\>/', $email, $match) ? $match[1] : $email; } $clean_email = array(); foreach ($email as $addy) { $clean_email[] = preg_match('/\<(.*)\>/', $addy, $match) ? $match[1] : $addy; } return $clean_email; } // -------------------------------------------------------------------- /** * Build alternative plain text message * * Provides the raw message for use in plain-text headers of * HTML-formatted emails. * If the user hasn't specified his own alternative message * it creates one by stripping the HTML * * @return string */ protected function _get_alt_message() { if ( ! empty($this->alt_message)) { return ($this->wordwrap) ? $this->word_wrap($this->alt_message, 76) : $this->alt_message; } $body = preg_match('/\<body.*?\>(.*)\<\/body\>/si', $this->_body, $match) ? $match[1] : $this->_body; $body = str_replace("\t", '', preg_replace('#<!--(.*)--\>#', '', trim(strip_tags($body)))); for ($i = 20; $i >= 3; $i--) { $body = str_replace(str_repeat("\n", $i), "\n\n", $body); } // Reduce multiple spaces $body = preg_replace('| +|', ' ', $body); return ($this->wordwrap) ? $this->word_wrap($body, 76) : $body; } // -------------------------------------------------------------------- /** * Word Wrap * * @param string * @param int line-length limit * @return string */ public function word_wrap($str, $charlim = NULL) { // Set the character limit, if not already present if (empty($charlim)) { $charlim = empty($this->wrapchars) ? 76 : $this->wrapchars; } // Standardize newlines if (strpos($str, "\r") !== FALSE) { $str = str_replace(array("\r\n", "\r"), "\n", $str); } // Reduce multiple spaces at end of line $str = preg_replace('| +\n|', "\n", $str); // If the current word is surrounded by {unwrap} tags we'll // strip the entire chunk and replace it with a marker. $unwrap = array(); if (preg_match_all('|\{unwrap\}(.+?)\{/unwrap\}|s', $str, $matches)) { for ($i = 0, $c = count($matches[0]); $i < $c; $i++) { $unwrap[] = $matches[1][$i]; $str = str_replace($matches[0][$i], '{{unwrapped'.$i.'}}', $str); } } // Use PHP's native function to do the initial wordwrap. // We set the cut flag to FALSE so that any individual words that are // too long get left alone. In the next step we'll deal with them. $str = wordwrap($str, $charlim, "\n", FALSE); // Split the string into individual lines of text and cycle through them $output = ''; foreach (explode("\n", $str) as $line) { // Is the line within the allowed character count? // If so we'll join it to the output and continue if (self::strlen($line) <= $charlim) { $output .= $line.$this->newline; continue; } $temp = ''; do { // If the over-length word is a URL we won't wrap it if (preg_match('!\[url.+\]|://|www\.!', $line)) { break; } // Trim the word down $temp .= self::substr($line, 0, $charlim - 1); $line = self::substr($line, $charlim - 1); } while (self::strlen($line) > $charlim); // If $temp contains data it means we had to split up an over-length // word into smaller chunks so we'll add it back to our current line if ($temp !== '') { $output .= $temp.$this->newline; } $output .= $line.$this->newline; } // Put our markers back if (count($unwrap) > 0) { foreach ($unwrap as $key => $val) { $output = str_replace('{{unwrapped'.$key.'}}', $val, $output); } } return $output; } // -------------------------------------------------------------------- /** * Build final headers * * @return void */ protected function _build_headers() { $this->set_header('User-Agent', $this->useragent); $this->set_header('X-Sender', $this->clean_email($this->_headers['From'])); $this->set_header('X-Mailer', $this->useragent); $this->set_header('X-Priority', $this->_priorities[$this->priority]); $this->set_header('Message-ID', $this->_get_message_id()); $this->set_header('Mime-Version', '1.0'); } // -------------------------------------------------------------------- /** * Write Headers as a string * * @return void */ protected function _write_headers() { if ($this->protocol === 'mail') { if (isset($this->_headers['Subject'])) { $this->_subject = $this->_headers['Subject']; unset($this->_headers['Subject']); } } reset($this->_headers); $this->_header_str = ''; foreach ($this->_headers as $key => $val) { $val = trim($val); if ($val !== '') { $this->_header_str .= $key.': '.$val.$this->newline; } } if ($this->_get_protocol() === 'mail') { $this->_header_str = rtrim($this->_header_str); } } // -------------------------------------------------------------------- /** * Build Final Body and attachments * * @return bool */ protected function _build_message() { if ($this->wordwrap === TRUE && $this->mailtype !== 'html') { $this->_body = $this->word_wrap($this->_body); } $this->_write_headers(); $hdr = ($this->_get_protocol() === 'mail') ? $this->newline : ''; $body = ''; switch ($this->_get_content_type()) { case 'plain': $hdr .= 'Content-Type: text/plain; charset='.$this->charset.$this->newline .'Content-Transfer-Encoding: '.$this->_get_encoding(); if ($this->_get_protocol() === 'mail') { $this->_header_str .= $hdr; $this->_finalbody = $this->_body; } else { $this->_finalbody = $hdr.$this->newline.$this->newline.$this->_body; } return; case 'html': if ($this->send_multipart === FALSE) { $hdr .= 'Content-Type: text/html; charset='.$this->charset.$this->newline .'Content-Transfer-Encoding: quoted-printable'; } else { $boundary = uniqid('B_ALT_'); $hdr .= 'Content-Type: multipart/alternative; boundary="'.$boundary.'"'; $body .= $this->_get_mime_message().$this->newline.$this->newline .'--'.$boundary.$this->newline .'Content-Type: text/plain; charset='.$this->charset.$this->newline .'Content-Transfer-Encoding: '.$this->_get_encoding().$this->newline.$this->newline .$this->_get_alt_message().$this->newline.$this->newline .'--'.$boundary.$this->newline .'Content-Type: text/html; charset='.$this->charset.$this->newline .'Content-Transfer-Encoding: quoted-printable'.$this->newline.$this->newline; } $this->_finalbody = $body.$this->_prep_quoted_printable($this->_body).$this->newline.$this->newline; if ($this->_get_protocol() === 'mail') { $this->_header_str .= $hdr; } else { $this->_finalbody = $hdr.$this->newline.$this->newline.$this->_finalbody; } if ($this->send_multipart !== FALSE) { $this->_finalbody .= '--'.$boundary.'--'; } return; case 'plain-attach': $boundary = uniqid('B_ATC_'); $hdr .= 'Content-Type: multipart/mixed; boundary="'.$boundary.'"'; if ($this->_get_protocol() === 'mail') { $this->_header_str .= $hdr; } $body .= $this->_get_mime_message().$this->newline .$this->newline .'--'.$boundary.$this->newline .'Content-Type: text/plain; charset='.$this->charset.$this->newline .'Content-Transfer-Encoding: '.$this->_get_encoding().$this->newline .$this->newline .$this->_body.$this->newline.$this->newline; $this->_append_attachments($body, $boundary); break; case 'html-attach': $alt_boundary = uniqid('B_ALT_'); $last_boundary = NULL; if ($this->_attachments_have_multipart('mixed')) { $atc_boundary = uniqid('B_ATC_'); $hdr .= 'Content-Type: multipart/mixed; boundary="'.$atc_boundary.'"'; $last_boundary = $atc_boundary; } if ($this->_attachments_have_multipart('related')) { $rel_boundary = uniqid('B_REL_'); $rel_boundary_header = 'Content-Type: multipart/related; boundary="'.$rel_boundary.'"'; if (isset($last_boundary)) { $body .= '--'.$last_boundary.$this->newline.$rel_boundary_header; } else { $hdr .= $rel_boundary_header; } $last_boundary = $rel_boundary; } if ($this->_get_protocol() === 'mail') { $this->_header_str .= $hdr; } self::strlen($body) && $body .= $this->newline.$this->newline; $body .= $this->_get_mime_message().$this->newline.$this->newline .'--'.$last_boundary.$this->newline .'Content-Type: multipart/alternative; boundary="'.$alt_boundary.'"'.$this->newline.$this->newline .'--'.$alt_boundary.$this->newline .'Content-Type: text/plain; charset='.$this->charset.$this->newline .'Content-Transfer-Encoding: '.$this->_get_encoding().$this->newline.$this->newline .$this->_get_alt_message().$this->newline.$this->newline .'--'.$alt_boundary.$this->newline .'Content-Type: text/html; charset='.$this->charset.$this->newline .'Content-Transfer-Encoding: quoted-printable'.$this->newline.$this->newline .$this->_prep_quoted_printable($this->_body).$this->newline.$this->newline .'--'.$alt_boundary.'--'.$this->newline.$this->newline; if ( ! empty($rel_boundary)) { $body .= $this->newline.$this->newline; $this->_append_attachments($body, $rel_boundary, 'related'); } // multipart/mixed attachments if ( ! empty($atc_boundary)) { $body .= $this->newline.$this->newline; $this->_append_attachments($body, $atc_boundary, 'mixed'); } break; } $this->_finalbody = ($this->_get_protocol() === 'mail') ? $body : $hdr.$this->newline.$this->newline.$body; return TRUE; } // -------------------------------------------------------------------- protected function _attachments_have_multipart($type) { foreach ($this->_attachments as &$attachment) { if ($attachment['multipart'] === $type) { return TRUE; } } return FALSE; } // -------------------------------------------------------------------- /** * Prepares attachment string * * @param string $body Message body to append to * @param string $boundary Multipart boundary * @param string $multipart When provided, only attachments of this type will be processed * @return string */ protected function _append_attachments(&$body, $boundary, $multipart = null) { for ($i = 0, $c = count($this->_attachments); $i < $c; $i++) { if (isset($multipart) && $this->_attachments[$i]['multipart'] !== $multipart) { continue; } $name = isset($this->_attachments[$i]['name'][1]) ? $this->_attachments[$i]['name'][1] : basename($this->_attachments[$i]['name'][0]); $body .= '--'.$boundary.$this->newline .'Content-Type: '.$this->_attachments[$i]['type'].'; name="'.$name.'"'.$this->newline .'Content-Disposition: '.$this->_attachments[$i]['disposition'].';'.$this->newline .'Content-Transfer-Encoding: base64'.$this->newline .(empty($this->_attachments[$i]['cid']) ? '' : 'Content-ID: <'.$this->_attachments[$i]['cid'].'>'.$this->newline) .$this->newline .$this->_attachments[$i]['content'].$this->newline; } // $name won't be set if no attachments were appended, // and therefore a boundary wouldn't be necessary empty($name) OR $body .= '--'.$boundary.'--'; } // -------------------------------------------------------------------- /** * Prep Quoted Printable * * Prepares string for Quoted-Printable Content-Transfer-Encoding * Refer to RFC 2045 http://www.ietf.org/rfc/rfc2045.txt * * @param string * @return string */ protected function _prep_quoted_printable($str) { // ASCII code numbers for "safe" characters that can always be // used literally, without encoding, as described in RFC 2049. // http://www.ietf.org/rfc/rfc2049.txt static $ascii_safe_chars = array( // ' ( ) + , - . / : = ? 39, 40, 41, 43, 44, 45, 46, 47, 58, 61, 63, // numbers 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, // upper-case letters 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, // lower-case letters 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122 ); // We are intentionally wrapping so mail servers will encode characters // properly and MUAs will behave, so {unwrap} must go! $str = str_replace(array('{unwrap}', '{/unwrap}'), '', $str); // RFC 2045 specifies CRLF as "\r\n". // However, many developers choose to override that and violate // the RFC rules due to (apparently) a bug in MS Exchange, // which only works with "\n". if ($this->crlf === "\r\n") { return quoted_printable_encode($str); } // Reduce multiple spaces & remove nulls $str = preg_replace(array('| +|', '/\x00+/'), array(' ', ''), $str); // Standardize newlines if (strpos($str, "\r") !== FALSE) { $str = str_replace(array("\r\n", "\r"), "\n", $str); } $escape = '='; $output = ''; foreach (explode("\n", $str) as $line) { $length = self::strlen($line); $temp = ''; // Loop through each character in the line to add soft-wrap // characters at the end of a line " =\r\n" and add the newly // processed line(s) to the output (see comment on $crlf class property) for ($i = 0; $i < $length; $i++) { // Grab the next character $char = $line[$i]; $ascii = ord($char); // Convert spaces and tabs but only if it's the end of the line if ($ascii === 32 OR $ascii === 9) { if ($i === ($length - 1)) { $char = $escape.sprintf('%02s', dechex($ascii)); } } // DO NOT move this below the $ascii_safe_chars line! // // = (equals) signs are allowed by RFC2049, but must be encoded // as they are the encoding delimiter! elseif ($ascii === 61) { $char = $escape.strtoupper(sprintf('%02s', dechex($ascii))); // =3D } elseif ( ! in_array($ascii, $ascii_safe_chars, TRUE)) { $char = $escape.strtoupper(sprintf('%02s', dechex($ascii))); } // If we're at the character limit, add the line to the output, // reset our temp variable, and keep on chuggin' if ((self::strlen($temp) + self::strlen($char)) >= 76) { $output .= $temp.$escape.$this->crlf; $temp = ''; } // Add the character to our temporary line $temp .= $char; } // Add our completed line to the output $output .= $temp.$this->crlf; } // get rid of extra CRLF tacked onto the end return self::substr($output, 0, self::strlen($this->crlf) * -1); } // -------------------------------------------------------------------- /** * Prep Q Encoding * * Performs "Q Encoding" on a string for use in email headers. * It's related but not identical to quoted-printable, so it has its * own method. * * @param string * @return string */ protected function _prep_q_encoding($str) { $str = str_replace(array("\r", "\n"), '', $str); if ($this->charset === 'UTF-8') { // Note: We used to have mb_encode_mimeheader() as the first choice // here, but it turned out to be buggy and unreliable. DO NOT // re-add it! -- Narf if (ICONV_ENABLED === TRUE) { $output = @iconv_mime_encode('', $str, array( 'scheme' => 'Q', 'line-length' => 76, 'input-charset' => $this->charset, 'output-charset' => $this->charset, 'line-break-chars' => $this->crlf ) ); // There are reports that iconv_mime_encode() might fail and return FALSE if ($output !== FALSE) { // iconv_mime_encode() will always put a header field name. // We've passed it an empty one, but it still prepends our // encoded string with ': ', so we need to strip it. return self::substr($output, 2); } $chars = iconv_strlen($str, 'UTF-8'); } elseif (MB_ENABLED === TRUE) { $chars = mb_strlen($str, 'UTF-8'); } } // We might already have this set for UTF-8 isset($chars) OR $chars = self::strlen($str); $output = '=?'.$this->charset.'?Q?'; for ($i = 0, $length = self::strlen($output); $i < $chars; $i++) { $chr = ($this->charset === 'UTF-8' && ICONV_ENABLED === TRUE) ? '='.implode('=', str_split(strtoupper(bin2hex(iconv_substr($str, $i, 1, $this->charset))), 2)) : '='.strtoupper(bin2hex($str[$i])); // RFC 2045 sets a limit of 76 characters per line. // We'll append ?= to the end of each line though. if ($length + ($l = self::strlen($chr)) > 74) { $output .= '?='.$this->crlf // EOL .' =?'.$this->charset.'?Q?'.$chr; // New line $length = 6 + self::strlen($this->charset) + $l; // Reset the length for the new line } else { $output .= $chr; $length += $l; } } // End the header return $output.'?='; } // -------------------------------------------------------------------- /** * Send Email * * @param bool $auto_clear = TRUE * @return bool */ public function send($auto_clear = TRUE) { if ( ! isset($this->_headers['From'])) { $this->_set_error_message('lang:email_no_from'); return FALSE; } if ($this->_replyto_flag === FALSE) { $this->reply_to($this->_headers['From']); } if ( ! isset($this->_recipients) && ! isset($this->_headers['To']) && ! isset($this->_bcc_array) && ! isset($this->_headers['Bcc']) && ! isset($this->_headers['Cc'])) { $this->_set_error_message('lang:email_no_recipients'); return FALSE; } $this->_build_headers(); if ($this->bcc_batch_mode && count($this->_bcc_array) > $this->bcc_batch_size) { $result = $this->batch_bcc_send(); if ($result && $auto_clear) { $this->clear(); } return $result; } if ($this->_build_message() === FALSE) { return FALSE; } $result = $this->_spool_email(); if ($result && $auto_clear) { $this->clear(); } return $result; } // -------------------------------------------------------------------- /** * Batch Bcc Send. Sends groups of BCCs in batches * * @return void */ public function batch_bcc_send() { $float = $this->bcc_batch_size - 1; $set = ''; $chunk = array(); for ($i = 0, $c = count($this->_bcc_array); $i < $c; $i++) { if (isset($this->_bcc_array[$i])) { $set .= ', '.$this->_bcc_array[$i]; } if ($i === $float) { $chunk[] = self::substr($set, 1); $float += $this->bcc_batch_size; $set = ''; } if ($i === $c-1) { $chunk[] = self::substr($set, 1); } } for ($i = 0, $c = count($chunk); $i < $c; $i++) { unset($this->_headers['Bcc']); $bcc = $this->clean_email($this->_str_to_array($chunk[$i])); if ($this->protocol !== 'smtp') { $this->set_header('Bcc', implode(', ', $bcc)); } else { $this->_bcc_array = $bcc; } if ($this->_build_message() === FALSE) { return FALSE; } $this->_spool_email(); } } // -------------------------------------------------------------------- /** * Unwrap special elements * * @return void */ protected function _unwrap_specials() { $this->_finalbody = preg_replace_callback('/\{unwrap\}(.*?)\{\/unwrap\}/si', array($this, '_remove_nl_callback'), $this->_finalbody); } // -------------------------------------------------------------------- /** * Strip line-breaks via callback * * @param string $matches * @return string */ protected function _remove_nl_callback($matches) { if (strpos($matches[1], "\r") !== FALSE OR strpos($matches[1], "\n") !== FALSE) { $matches[1] = str_replace(array("\r\n", "\r", "\n"), '', $matches[1]); } return $matches[1]; } // -------------------------------------------------------------------- /** * Spool mail to the mail server * * @return bool */ protected function _spool_email() { $this->_unwrap_specials(); $method = '_send_with_'.$this->_get_protocol(); if ( ! $this->$method()) { $this->_set_error_message('lang:email_send_failure_'.($this->_get_protocol() === 'mail' ? 'phpmail' : $this->_get_protocol())); return FALSE; } $this->_set_error_message('lang:email_sent', $this->_get_protocol()); return TRUE; } // -------------------------------------------------------------------- /** * Validate email for shell * * Applies stricter, shell-safe validation to email addresses. * Introduced to prevent RCE via sendmail's -f option. * * @see https://github.com/bcit-ci/CodeIgniter/issues/4963 * @see https://gist.github.com/Zenexer/40d02da5e07f151adeaeeaa11af9ab36 * @license https://creativecommons.org/publicdomain/zero/1.0/ CC0 1.0, Public Domain * * Credits for the base concept go to Paul Buonopane <paul@namepros.com> * * @param string $email * @return bool */ protected function _validate_email_for_shell(&$email) { if (function_exists('idn_to_ascii') && $atpos = strpos($email, '@')) { $email = self::substr($email, 0, ++$atpos).idn_to_ascii(self::substr($email, $atpos)); } return (filter_var($email, FILTER_VALIDATE_EMAIL) === $email && preg_match('#\A[a-z0-9._+-]+@[a-z0-9.-]{1,253}\z#i', $email)); } // -------------------------------------------------------------------- /** * Send using mail() * * @return bool */ protected function _send_with_mail() { if (is_array($this->_recipients)) { $this->_recipients = implode(', ', $this->_recipients); } // _validate_email_for_shell() below accepts by reference, // so this needs to be assigned to a variable $from = $this->clean_email($this->_headers['Return-Path']); if ($this->_safe_mode === TRUE || ! $this->_validate_email_for_shell($from)) { return mail($this->_recipients, $this->_subject, $this->_finalbody, $this->_header_str); } else { // most documentation of sendmail using the "-f" flag lacks a space after it, however // we've encountered servers that seem to require it to be in place. return mail($this->_recipients, $this->_subject, $this->_finalbody, $this->_header_str, '-f '.$from); } } // -------------------------------------------------------------------- /** * Send using Sendmail * * @return bool */ protected function _send_with_sendmail() { // _validate_email_for_shell() below accepts by reference, // so this needs to be assigned to a variable $from = $this->clean_email($this->_headers['From']); if ($this->_validate_email_for_shell($from)) { $from = '-f '.$from; } else { $from = ''; } // is popen() enabled? if ( ! function_usable('popen') OR FALSE === ($fp = @popen($this->mailpath.' -oi '.$from.' -t', 'w'))) { // server probably has popen disabled, so nothing we can do to get a verbose error. return FALSE; } fputs($fp, $this->_header_str); fputs($fp, $this->_finalbody); $status = pclose($fp); if ($status !== 0) { $this->_set_error_message('lang:email_exit_status', $status); $this->_set_error_message('lang:email_no_socket'); return FALSE; } return TRUE; } // -------------------------------------------------------------------- /** * Send using SMTP * * @return bool */ protected function _send_with_smtp() { if ($this->smtp_host === '') { $this->_set_error_message('lang:email_no_hostname'); return FALSE; } if ( ! $this->_smtp_connect() OR ! $this->_smtp_authenticate()) { return FALSE; } if ( ! $this->_send_command('from', $this->clean_email($this->_headers['From']))) { $this->_smtp_end(); return FALSE; } foreach ($this->_recipients as $val) { if ( ! $this->_send_command('to', $val)) { $this->_smtp_end(); return FALSE; } } if (count($this->_cc_array) > 0) { foreach ($this->_cc_array as $val) { if ($val !== '' && ! $this->_send_command('to', $val)) { $this->_smtp_end(); return FALSE; } } } if (count($this->_bcc_array) > 0) { foreach ($this->_bcc_array as $val) { if ($val !== '' && ! $this->_send_command('to', $val)) { $this->_smtp_end(); return FALSE; } } } if ( ! $this->_send_command('data')) { $this->_smtp_end(); return FALSE; } // perform dot transformation on any lines that begin with a dot $this->_send_data($this->_header_str.preg_replace('/^\./m', '..$1', $this->_finalbody)); $this->_send_data('.'); $reply = $this->_get_smtp_data(); $this->_set_error_message($reply); $this->_smtp_end(); if (strpos($reply, '250') !== 0) { $this->_set_error_message('lang:email_smtp_error', $reply); return FALSE; } return TRUE; } // -------------------------------------------------------------------- /** * SMTP End * * Shortcut to send RSET or QUIT depending on keep-alive * * @return void */ protected function _smtp_end() { ($this->smtp_keepalive) ? $this->_send_command('reset') : $this->_send_command('quit'); } // -------------------------------------------------------------------- /** * SMTP Connect * * @return string */ protected function _smtp_connect() { if (is_resource($this->_smtp_connect)) { return TRUE; } $ssl = ($this->smtp_crypto === 'ssl') ? 'ssl://' : ''; $this->_smtp_connect = fsockopen($ssl.$this->smtp_host, $this->smtp_port, $errno, $errstr, $this->smtp_timeout); if ( ! is_resource($this->_smtp_connect)) { $this->_set_error_message('lang:email_smtp_error', $errno.' '.$errstr); return FALSE; } stream_set_timeout($this->_smtp_connect, $this->smtp_timeout); $this->_set_error_message($this->_get_smtp_data()); if ($this->smtp_crypto === 'tls') { $this->_send_command('hello'); $this->_send_command('starttls'); $crypto = stream_socket_enable_crypto($this->_smtp_connect, TRUE, STREAM_CRYPTO_METHOD_TLS_CLIENT); if ($crypto !== TRUE) { $this->_set_error_message('lang:email_smtp_error', $this->_get_smtp_data()); return FALSE; } } return $this->_send_command('hello'); } // -------------------------------------------------------------------- /** * Send SMTP command * * @param string * @param string * @return bool */ protected function _send_command($cmd, $data = '') { switch ($cmd) { case 'hello' : if ($this->_smtp_auth OR $this->_get_encoding() === '8bit') { $this->_send_data('EHLO '.$this->_get_hostname()); } else { $this->_send_data('HELO '.$this->_get_hostname()); } $resp = 250; break; case 'starttls' : $this->_send_data('STARTTLS'); $resp = 220; break; case 'from' : $this->_send_data('MAIL FROM:<'.$data.'>'); $resp = 250; break; case 'to' : if ($this->dsn) { $this->_send_data('RCPT TO:<'.$data.'> NOTIFY=SUCCESS,DELAY,FAILURE ORCPT=rfc822;'.$data); } else { $this->_send_data('RCPT TO:<'.$data.'>'); } $resp = 250; break; case 'data' : $this->_send_data('DATA'); $resp = 354; break; case 'reset': $this->_send_data('RSET'); $resp = 250; break; case 'quit' : $this->_send_data('QUIT'); $resp = 221; break; } $reply = $this->_get_smtp_data(); $this->_debug_msg[] = '<pre>'.$cmd.': '.$reply.'</pre>'; if ((int) self::substr($reply, 0, 3) !== $resp) { $this->_set_error_message('lang:email_smtp_error', $reply); return FALSE; } if ($cmd === 'quit') { fclose($this->_smtp_connect); } return TRUE; } // -------------------------------------------------------------------- /** * SMTP Authenticate * * @return bool */ protected function _smtp_authenticate() { if ( ! $this->_smtp_auth) { return TRUE; } if ($this->smtp_user === '' && $this->smtp_pass === '') { $this->_set_error_message('lang:email_no_smtp_unpw'); return FALSE; } $this->_send_data('AUTH LOGIN'); $reply = $this->_get_smtp_data(); if (strpos($reply, '503') === 0) // Already authenticated { return TRUE; } elseif (strpos($reply, '334') !== 0) { $this->_set_error_message('lang:email_failed_smtp_login', $reply); return FALSE; } $this->_send_data(base64_encode($this->smtp_user)); $reply = $this->_get_smtp_data(); if (strpos($reply, '334') !== 0) { $this->_set_error_message('lang:email_smtp_auth_un', $reply); return FALSE; } $this->_send_data(base64_encode($this->smtp_pass)); $reply = $this->_get_smtp_data(); if (strpos($reply, '235') !== 0) { $this->_set_error_message('lang:email_smtp_auth_pw', $reply); return FALSE; } if ($this->smtp_keepalive) { $this->_smtp_auth = FALSE; } return TRUE; } // -------------------------------------------------------------------- /** * Send SMTP data * * @param string $data * @return bool */ protected function _send_data($data) { $data .= $this->newline; for ($written = $timestamp = 0, $length = self::strlen($data); $written < $length; $written += $result) { if (($result = fwrite($this->_smtp_connect, self::substr($data, $written))) === FALSE) { break; } // See https://bugs.php.net/bug.php?id=39598 and http://php.net/manual/en/function.fwrite.php#96951 elseif ($result === 0) { if ($timestamp === 0) { $timestamp = time(); } elseif ($timestamp < (time() - $this->smtp_timeout)) { $result = FALSE; break; } usleep(250000); continue; } else { $timestamp = 0; } } if ($result === FALSE) { $this->_set_error_message('lang:email_smtp_data_failure', $data); return FALSE; } return TRUE; } // -------------------------------------------------------------------- /** * Get SMTP data * * @return string */ protected function _get_smtp_data() { $data = ''; while ($str = fgets($this->_smtp_connect, 512)) { $data .= $str; if ($str[3] === ' ') { break; } } return $data; } // -------------------------------------------------------------------- /** * Get Hostname * * There are only two legal types of hostname - either a fully * qualified domain name (eg: "mail.example.com") or an IP literal * (eg: "[1.2.3.4]"). * * @link https://tools.ietf.org/html/rfc5321#section-2.3.5 * @link http://cbl.abuseat.org/namingproblems.html * @return string */ protected function _get_hostname() { if (isset($_SERVER['SERVER_NAME'])) { return $_SERVER['SERVER_NAME']; } return isset($_SERVER['SERVER_ADDR']) ? '['.$_SERVER['SERVER_ADDR'].']' : '[127.0.0.1]'; } // -------------------------------------------------------------------- /** * Get Debug Message * * @param array $include List of raw data chunks to include in the output * Valid options are: 'headers', 'subject', 'body' * @return string */ public function print_debugger($include = array('headers', 'subject', 'body')) { $msg = ''; if (count($this->_debug_msg) > 0) { foreach ($this->_debug_msg as $val) { $msg .= $val; } } // Determine which parts of our raw data needs to be printed $raw_data = ''; is_array($include) OR $include = array($include); if (in_array('headers', $include, TRUE)) { $raw_data = htmlspecialchars($this->_header_str)."\n"; } if (in_array('subject', $include, TRUE)) { $raw_data .= htmlspecialchars($this->_subject)."\n"; } if (in_array('body', $include, TRUE)) { $raw_data .= htmlspecialchars($this->_finalbody); } return $msg.($raw_data === '' ? '' : '<pre>'.$raw_data.'</pre>'); } // -------------------------------------------------------------------- /** * Set Message * * @param string $msg * @param string $val = '' * @return void */ protected function _set_error_message($msg, $val = '') { $CI =& get_instance(); $CI->lang->load('email'); if (sscanf($msg, 'lang:%s', $line) !== 1 OR FALSE === ($line = $CI->lang->line($line))) { $this->_debug_msg[] = str_replace('%s', $val, $msg).'<br />'; } else { $this->_debug_msg[] = str_replace('%s', $val, $line).'<br />'; } } // -------------------------------------------------------------------- /** * Mime Types * * @param string * @return string */ protected function _mime_types($ext = '') { $ext = strtolower($ext); $mimes =& get_mimes(); if (isset($mimes[$ext])) { return is_array($mimes[$ext]) ? current($mimes[$ext]) : $mimes[$ext]; } return 'application/x-unknown-content-type'; } // -------------------------------------------------------------------- /** * Destructor * * @return void */ public function __destruct() { is_resource($this->_smtp_connect) && $this->_send_command('quit'); } // -------------------------------------------------------------------- /** * Byte-safe strlen() * * @param string $str * @return int */ protected static function strlen($str) { return (self::$func_override) ? mb_strlen($str, '8bit') : strlen($str); } // -------------------------------------------------------------------- /** * Byte-safe substr() * * @param string $str * @param int $start * @param int $length * @return string */ protected static function substr($str, $start, $length = NULL) { if (self::$func_override) { // mb_substr($str, $start, null, '8bit') returns an empty // string on PHP 5.3 isset($length) OR $length = ($start >= 0 ? self::strlen($str) - $start : -$start); return mb_substr($str, $start, $length, '8bit'); } return isset($length) ? substr($str, $start, $length) : substr($str, $start); } }
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🔐 Dosya İzinleri (chmod)
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755
644
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777
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755
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