Current Path : C:/xampp/htdocs/moodle/lib/horde/framework/Horde/Stream/Wrapper/ |
Current File : C:/xampp/htdocs/moodle/lib/horde/framework/Horde/Stream/Wrapper/String.php |
<?php /** * Copyright 2007-2017 Horde LLC (http://www.horde.org/) * * See the enclosed file LICENSE for license information (BSD). If you * did not receive this file, see http://www.horde.org/licenses/bsd. * * @category Horde * @copyright 2007-2017 Horde LLC * @license http://www.horde.org/licenses/bsd BSD * @package Stream_Wrapper */ /** * A stream wrapper that will treat a native PHP string as a stream. * * @author Chuck Hagenbuch <chuck@horde.org> * @author Michael Slusarz <slusarz@horde.org> * @category Horde * @copyright 2007-2017 Horde LLC * @license http://www.horde.org/licenses/bsd BSD * @package Stream_Wrapper */ class Horde_Stream_Wrapper_String { /**/ const WRAPPER_NAME = 'horde-stream-wrapper-string'; /** * The current context. * * @var resource */ public $context; /** * String position. * * @var integer */ protected $_pos; /** * The string. * * @var string */ protected $_string; /** * Unique ID tracker for the streams. * * @var integer */ private static $_id = 0; /** * Create a stream from a PHP string. * * @since 2.1.0 * * @param string &$string A PHP string variable. * * @return resource A PHP stream pointing to the variable. */ public static function getStream(&$string) { if (!self::$_id) { stream_wrapper_register(self::WRAPPER_NAME, __CLASS__); } /* Needed to keep reference. */ $ob = new stdClass; $ob->string = &$string; return fopen( self::WRAPPER_NAME . '://' . ++self::$_id, 'wb', false, stream_context_create(array( self::WRAPPER_NAME => array( 'string' => $ob ) )) ); } /** * @see streamWrapper::stream_open() */ public function stream_open($path, $mode, $options, &$opened_path) { $opts = stream_context_get_options($this->context); if (isset($opts[self::WRAPPER_NAME]['string'])) { $this->_string =& $opts[self::WRAPPER_NAME]['string']->string; } elseif (isset($opts['horde-string']['string'])) { // @deprecated $this->_string =& $opts['horde-string']['string']->getString(); } else { throw new Exception('Use ' . __CLASS__ . '::getStream() to initialize the stream.'); } if (is_null($this->_string)) { return false; } $this->_pos = 0; return true; } /** * @see streamWrapper::stream_close() */ public function stream_close() { $this->_string = ''; $this->_pos = 0; } /** * @see streamWrapper::stream_read() */ public function stream_read($count) { $curr = $this->_pos; $this->_pos += $count; return substr($this->_string, $curr, $count); } /** * @see streamWrapper::stream_write() */ public function stream_write($data) { $len = strlen($data); $this->_string = substr_replace($this->_string, $data, $this->_pos, $len); $this->_pos += $len; return $len; } /** * @see streamWrapper::stream_tell() */ public function stream_tell() { return $this->_pos; } /** * @see streamWrapper::stream_eof() */ public function stream_eof() { return ($this->_pos > strlen($this->_string)); } /** * @see streamWrapper::stream_stat() */ public function stream_stat() { return array( 'dev' => 0, 'ino' => 0, 'mode' => 0, 'nlink' => 0, 'uid' => 0, 'gid' => 0, 'rdev' => 0, 'size' => strlen($this->_string), 'atime' => 0, 'mtime' => 0, 'ctime' => 0, 'blksize' => 0, 'blocks' => 0 ); } /** * @see streamWrapper::stream_seek() */ public function stream_seek($offset, $whence) { switch ($whence) { case SEEK_SET: $pos = $offset; break; case SEEK_CUR: $pos = $this->_pos + $offset; break; case SEEK_END: $pos = strlen($this->_string) + $offset; break; } if (($pos < 0) || ($pos > strlen($this->_string))) { return false; } $this->_pos = $pos; return true; } }