<?php
namespace PHPVideoToolkit;
/**
* ProcessUtils is a bunch of utility methods taken from Symphony.
*
* This class contains static methods only and is not meant to be instantiated.
*
* @author Martin HasoĊ <martin.hason@gmail.com>
*/
class ProcessUtils
{
/**
* This class should not be instantiated.
*/
private function __construct()
{
}
/**
* Escapes a string to be used as a shell argument.
*
* @param string $argument The argument that will be escaped
*
* @return string The escaped argument
*/
public static function escapeArgument($argument)
{
//Fix for PHP bug #43784 escapeshellarg removes % from given string
//Fix for PHP bug #49446 escapeshellarg doesn't work on Windows
//@see https://bugs.php.net/bug.php?id=43784
//@see https://bugs.php.net/bug.php?id=49446
if ('\\' === DIRECTORY_SEPARATOR) {
if ('' === $argument) {
return escapeshellarg($argument);
}
$escapedArgument = '';
$quote = false;
foreach (preg_split('/(")/', $argument, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE) as $part) {
if ('"' === $part) {
$escapedArgument .= '\\"';
} elseif (self::isSurroundedBy($part, '%')) {
// Avoid environment variable expansion
$escapedArgument .= '^%"'.substr($part, 1, -1).'"^%';
} else {
// escape trailing backslash
if ('\\' === substr($part, -1)) {
$part .= '\\';
}
$quote = true;
$escapedArgument .= $part;
}
}
if ($quote) {
$escapedArgument = '"'.$escapedArgument.'"';
}
return $escapedArgument;
}
return escapeshellarg($argument);
}
private static function isSurroundedBy($arg, $char)
{
return 2 < strlen($arg) && $char === $arg[0] && $char === $arg[strlen($arg) - 1];
}
}
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