source: trunk/www.guidonia.net/wp/wp-includes/compat.php@ 44

Last change on this file since 44 was 44, checked in by luciano, 15 years ago
File size: 3.3 KB
Line 
1<?php
2/**
3 * WordPress implementation for PHP functions missing from older PHP versions.
4 *
5 * @package PHP
6 * @access private
7 */
8
9// Added in PHP 5.0
10
11if (!function_exists('http_build_query')) {
12 function http_build_query($data, $prefix=null, $sep=null) {
13 return _http_build_query($data, $prefix, $sep);
14 }
15}
16
17// from php.net (modified by Mark Jaquith to behave like the native PHP5 function)
18function _http_build_query($data, $prefix=null, $sep=null, $key='', $urlencode=true) {
19 $ret = array();
20
21 foreach ( (array) $data as $k => $v ) {
22 if ( $urlencode)
23 $k = urlencode($k);
24 if ( is_int($k) && $prefix != null )
25 $k = $prefix.$k;
26 if ( !empty($key) )
27 $k = $key . '%5B' . $k . '%5D';
28 if ( $v === NULL )
29 continue;
30 elseif ( $v === FALSE )
31 $v = '0';
32
33 if ( is_array($v) || is_object($v) )
34 array_push($ret,_http_build_query($v, '', $sep, $k, $urlencode));
35 elseif ( $urlencode )
36 array_push($ret, $k.'='.urlencode($v));
37 else
38 array_push($ret, $k.'='.$v);
39 }
40
41 if ( NULL === $sep )
42 $sep = ini_get('arg_separator.output');
43
44 return implode($sep, $ret);
45}
46
47if ( !function_exists('_') ) {
48 function _($string) {
49 return $string;
50 }
51}
52
53if (!function_exists('stripos')) {
54 function stripos($haystack, $needle, $offset = 0) {
55 return strpos(strtolower($haystack), strtolower($needle), $offset);
56 }
57}
58
59if ( ! function_exists('hash_hmac') ):
60function hash_hmac($algo, $data, $key, $raw_output = false) {
61 $packs = array('md5' => 'H32', 'sha1' => 'H40');
62
63 if ( !isset($packs[$algo]) )
64 return false;
65
66 $pack = $packs[$algo];
67
68 if (strlen($key) > 64)
69 $key = pack($pack, $algo($key));
70 else if (strlen($key) < 64)
71 $key = str_pad($key, 64, chr(0));
72
73 $ipad = (substr($key, 0, 64) ^ str_repeat(chr(0x36), 64));
74 $opad = (substr($key, 0, 64) ^ str_repeat(chr(0x5C), 64));
75
76 return $algo($opad . pack($pack, $algo($ipad . $data)));
77}
78endif;
79
80if ( ! function_exists('mb_substr') ):
81 function mb_substr( $str, $start, $length=null, $encoding=null ) {
82 return _mb_substr($str, $start, $length, $encoding);
83 }
84endif;
85
86function _mb_substr( $str, $start, $length=null, $encoding=null ) {
87 // the solution below, works only for utf-8, so in case of a different
88 // charset, just use built-in substr
89 $charset = get_option( 'blog_charset' );
90 if ( !in_array( $charset, array('utf8', 'utf-8', 'UTF8', 'UTF-8') ) ) {
91 return is_null( $length )? substr( $str, $start ) : substr( $str, $start, $length);
92 }
93 // use the regex unicode support to separate the UTF-8 characters into an array
94 preg_match_all( '/./us', $str, $match );
95 $chars = is_null( $length )? array_slice( $match[0], $start ) : array_slice( $match[0], $start, $length );
96 return implode( '', $chars );
97}
98
99if ( !function_exists( 'htmlspecialchars_decode' ) ) {
100 // Added in PHP 5.1.0
101 // Error checks from PEAR::PHP_Compat
102 function htmlspecialchars_decode( $string, $quote_style = ENT_COMPAT )
103 {
104 if ( !is_scalar( $string ) ) {
105 trigger_error( 'htmlspecialchars_decode() expects parameter 1 to be string, ' . gettype( $string ) . ' given', E_USER_WARNING );
106 return;
107 }
108
109 if ( !is_int( $quote_style ) && $quote_style !== null ) {
110 trigger_error( 'htmlspecialchars_decode() expects parameter 2 to be integer, ' . gettype( $quote_style ) . ' given', E_USER_WARNING );
111 return;
112 }
113
114 return wp_specialchars_decode( $string, $quote_style );
115 }
116}
117
118?>
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