<?php
/*
* This file is part of SwiftMailer.
* (c) 2004-2009 Chris Corbyn
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
/**
* Processes bytes as they pass through a buffer and replaces sequences in it.
*
* @author Chris Corbyn
*/
class Swift_StreamFilters_StringReplacementFilter implements Swift_StreamFilter
{
/** The needle(s) to search for */
private $_search;
/** The replacement(s) to make */
private $_replace;
/**
* Create a new StringReplacementFilter with $search and $replace.
*
* @param string|array $search
* @param string|array $replace
*/
public function __construct($search, $replace)
{
$this->_search = $search;
$this->_replace = $replace;
}
/**
* Returns true if based on the buffer passed more bytes should be buffered.
*
* @param string $buffer
*
* @return bool
*/
public function shouldBuffer($buffer)
{
if ('' === $buffer) {
return false;
}
$endOfBuffer = substr($buffer, -1);
foreach ((array) $this->_search as $needle) {
if (false !== strpos($needle, $endOfBuffer)) {
return true;
}
}
return false;
}
/**
* Perform the actual replacements on $buffer and return the result.
*
* @param string $buffer
*
* @return string
*/
public function filter($buffer)
{
return str_replace($this->_search, $this->_replace, $buffer);
}
}