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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: Philippe Jausions <Philippe.Jausions@11abacus.com> |
// | Aidan Lister <aidan@php.net> |
// +----------------------------------------------------------------------+
//
// $Id: version_compare.php 2 2009-03-16 20:22:51Z ggiunta $
/**
* Replace version_compare()
*
* @category PHP
* @package PHP_Compat
* @link http://php.net/function.version_compare
* @author Philippe Jausions <Philippe.Jausions@11abacus.com>
* @author Aidan Lister <aidan@php.net>
* @version $Revision: 1.1 $
* @since PHP 4.1.0
* @require PHP 4.0.0 (user_error)
*/
if (!function_exists('version_compare')) {
function version_compare($version1, $version2, $operator = '<')
{
// Check input
if (!is_scalar($version1)) {
user_error('version_compare() expects parameter 1 to be string, ' .
gettype($version1) . ' given', E_USER_WARNING);
return;
}
if (!is_scalar($version2)) {
user_error('version_compare() expects parameter 2 to be string, ' .
gettype($version2) . ' given', E_USER_WARNING);
return;
}
if (!is_scalar($operator)) {
user_error('version_compare() expects parameter 3 to be string, ' .
gettype($operator) . ' given', E_USER_WARNING);
return;
}
// Standardise versions
$v1 = explode('.',
str_replace('..', '.',
preg_replace('/([^0-9\.]+)/', '.$1.',
str_replace(array('-', '_', '+'), '.',
trim($version1)))));
$v2 = explode('.',
str_replace('..', '.',
preg_replace('/([^0-9\.]+)/', '.$1.',
str_replace(array('-', '_', '+'), '.',
trim($version2)))));
// Replace empty entries at the start of the array
while (empty($v1[0]) && array_shift($v1)) {}
while (empty($v2[0]) && array_shift($v2)) {}
// Release state order
// '#' stands for any number
$versions = array(
'dev' => 0,
'alpha' => 1,
'a' => 1,
'beta' => 2,
'b' => 2,
'RC' => 3,
'#' => 4,
'p' => 5,
'pl' => 5);
// Loop through each segment in the version string
$compare = 0;
for ($i = 0, $x = min(count($v1), count($v2)); $i < $x; $i++) {
if ($v1[$i] == $v2[$i]) {
continue;
}
$i1 = $v1[$i];
$i2 = $v2[$i];
if (is_numeric($i1) && is_numeric($i2)) {
$compare = ($i1 < $i2) ? -1 : 1;
break;
}
// We use the position of '#' in the versions list
// for numbers... (so take care of # in original string)
if ($i1 == '#') {
$i1 = '';
} elseif (is_numeric($i1)) {
$i1 = '#';
}
if ($i2 == '#') {
$i2 = '';
} elseif (is_numeric($i2)) {
$i2 = '#';
}
if (isset($versions[$i1]) && isset($versions[$i2])) {
$compare = ($versions[$i1] < $versions[$i2]) ? -1 : 1;
} elseif (isset($versions[$i1])) {
$compare = 1;
} elseif (isset($versions[$i2])) {
$compare = -1;
} else {
$compare = 0;
}
break;
}
// If previous loop didn't find anything, compare the "extra" segments
if ($compare == 0) {
if (count($v2) > count($v1)) {
if (isset($versions[$v2[$i]])) {
$compare = ($versions[$v2[$i]] < 4) ? 1 : -1;
} else {
$compare = -1;
}
} elseif (count($v2) < count($v1)) {
if (isset($versions[$v1[$i]])) {
$compare = ($versions[$v1[$i]] < 4) ? -1 : 1;
} else {
$compare = 1;
}
}
}
// Compare the versions
if (func_num_args() > 2) {
switch ($operator) {
case '>':
case 'gt':
return (bool) ($compare > 0);
break;
case '>=':
case 'ge':
return (bool) ($compare >= 0);
break;
case '<=':
case 'le':
return (bool) ($compare <= 0);
break;
case '==':
case '=':
case 'eq':
return (bool) ($compare == 0);
break;
case '<>':
case '!=':
case 'ne':
return (bool) ($compare != 0);
break;
case '':
case '<':
case 'lt':
return (bool) ($compare < 0);
break;
default:
return;
}
}
return $compare;
}
}
?>
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