1 <?php
2 
3 /**
4  * compatibility functions
5  *
6  * This file contains a few functions that might be missing from the PHP build
7  */
8 
9 if (!function_exists('ctype_space')) {
10     /**
11      * Check for whitespace character(s)
12      *
13      * @param string $text
14      * @return bool
15      * @see ctype_space
16      */
17     function ctype_space($text)
18     {
19         if (!is_string($text)) return false; #FIXME original treats between -128 and 255 inclusive as ASCII chars
20         if (trim($text) === '') return true;
21         return false;
22     }
23 }
24 
25 if (!function_exists('ctype_digit')) {
26     /**
27      * Check for numeric character(s)
28      *
29      * @param string $text
30      * @return bool
31      * @see ctype_digit
32      */
33     function ctype_digit($text)
34     {
35         if (!is_string($text)) return false; #FIXME original treats between -128 and 255 inclusive as ASCII chars
36         if (preg_match('/^\d+$/', $text)) return true;
37         return false;
38     }
39 }
40 
41 if (!function_exists('gzopen') && function_exists('gzopen64')) {
42     /**
43      * work around for PHP compiled against certain zlib versions #865
44      *
45      * @link http://stackoverflow.com/questions/23417519/php-zlib-gzopen-not-exists
46      *
47      * @param string $filename
48      * @param string $mode
49      * @param int $use_include_path
50      * @return mixed
51      */
52     function gzopen($filename, $mode, $use_include_path = 0)
53     {
54         return gzopen64($filename, $mode, $use_include_path);
55     }
56 }
57 
58 if (!function_exists('gzseek') && function_exists('gzseek64')) {
59     /**
60      * work around for PHP compiled against certain zlib versions #865
61      *
62      * @link http://stackoverflow.com/questions/23417519/php-zlib-gzopen-not-exists
63      *
64      * @param resource $zp
65      * @param int $offset
66      * @param int $whence
67      * @return int
68      */
69     function gzseek($zp, $offset, $whence = SEEK_SET)
70     {
71         return gzseek64($zp, $offset, $whence);
72     }
73 }
74 
75 if (!function_exists('gztell') && function_exists('gztell64')) {
76     /**
77      * work around for PHP compiled against certain zlib versions #865
78      *
79      * @link   http://stackoverflow.com/questions/23417519/php-zlib-gzopen-not-exists
80      *
81      * @param resource $zp
82      * @return int
83      */
84     function gztell($zp)
85     {
86         return gztell64($zp);
87     }
88 }
89 
90 /**
91  * polyfill for PHP < 8
92  * @see https://www.php.net/manual/en/function.str-starts-with
93  */
94 if (!function_exists('str_starts_with')) {
95     function str_starts_with(?string $haystack, ?string $needle)
96     {
97         return 0 === strncmp($haystack, $needle, \strlen($needle));
98     }
99 }
100 
101 /**
102  * polyfill for PHP < 8
103  * @see https://www.php.net/manual/en/function.str-contains
104  */
105 if (!function_exists('str_contains')) {
106     function str_contains(?string $haystack, ?string $needle)
107     {
108         return '' === $needle || false !== strpos($haystack, (string) $needle);
109     }
110 }
111 
112 /**
113  * polyfill for PHP < 8
114  * @see https://www.php.net/manual/en/function.str-ends-with
115  */
116 if (!function_exists('str_ends_with')) {
117     function str_ends_with(?string $haystack, ?string $needle)
118     {
119         if ('' === $needle || $needle === $haystack) {
120             return true;
121         }
122 
123         if ('' === $haystack) {
124             return false;
125         }
126 
127         $needleLength = \strlen($needle);
128 
129         return $needleLength <= \strlen($haystack) && 0 === substr_compare($haystack, $needle, -$needleLength);
130     }
131 }
132 
133 /**
134  * polyfill for PHP < 8.1
135  * @see https://www.php.net/manual/en/function.array-is-list
136  */
137 if (!function_exists('array_is_list')) {
138     function array_is_list(array $arr)
139     {
140         if ($arr === []) {
141             return true;
142         }
143         return array_keys($arr) === range(0, count($arr) - 1);
144     }
145 }
146