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<?php
// +----------------------------------------------------------------------+
// | PHP Version 4 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2004 The PHP Group |
// +----------------------------------------------------------------------+
// | This source file is subject to version 3.0 of the PHP license, |
// | that is bundled with this package in the file LICENSE, and is |
// | available at through the world-wide-web at |
// | http://www.php.net/license/3_0.txt. |
// | If you did not receive a copy of the PHP license and are unable to |
// | obtain it through the world-wide-web, please send a note to |
// | license@php.net so we can mail you a copy immediately. |
// +----------------------------------------------------------------------+
// | Authors: Aidan Lister <aidan@php.net> |
// +----------------------------------------------------------------------+
//
// $Id: Compat.php,v 1.19 2005/05/10 12:05:36 aidan Exp $
/**
* Provides missing functionality in the form of constants and functions
* for older versions of PHP
*
* Optionally, you may simply include the file.
* e.g. require_once 'PHP/Compat/Function/scandir.php';
*
* @category PHP
* @package PHP_Compat
* @version $Revision: 1.19 $
* @author Aidan Lister <aidan@php.net>
* @static
*/
class PHP_Compat
{
/**
* Load a function, or array of functions
*
* @param string|array $function The function or functions to load
* @return bool|array TRUE if loaded, FALSE if not
*/
function loadFunction($function)
{
// Recursiveness
if (is_array($function)) {
$res = array();
foreach ($function as $singlefunc) {
$res[$singlefunc] = PHP_Compat::loadFunction($singlefunc);
}
return $res;
}
// Load function
if (!function_exists($function)) {
$file = sprintf('PHP/Compat/Function/%s.php', $function);
if ((@include_once $file) !== false) {
return true;
}
}
return false;
}
/**
* Load a constant, or array of constants
*
* @param string|array $constant The constant or constants to load
* @return bool|array TRUE if loaded, FALSE if not
*/
function loadConstant($constant)
{
// Recursiveness
if (is_array($constant)) {
$res = array();
foreach ($constant as $singleconst) {
$res[$singleconst] = PHP_Compat::loadConstant($singleconst);
}
return $res;
}
// Load constant
$file = sprintf('PHP/Compat/Constant/%s.php', $constant);
if ((@include_once $file) !== false) {
return true;
}
return false;
}
/**
* Load components for a PHP version
*
* @param string $version PHP Version to load
* @return array An associative array of component names loaded
*/
function loadVersion($version = null)
{
// Include list of components
require 'PHP/Compat/Components.php';
// Include version_compare to work with older versions
PHP_Compat::loadFunction('version_compare');
// Init
$phpversion = phpversion();
$methods = array(
'function' => 'loadFunction',
'constant' => 'loadConstant');
$res = array();
// Iterate each component
foreach ($components as $type => $slice) {
foreach ($slice as $component => $compversion) {
if (($version === null &&
1 === version_compare($compversion, $phpversion)) || // C > PHP
(0 === version_compare($compversion, $version) || // C = S
1 === version_compare($compversion, $phpversion))) { // C > PHP
$res[$type][$component] =
call_user_func(array('PHP_Compat', $methods[$type]), $component);
}
}
}
return $res;
}
}
?>
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