1--TEST--
2Test mb_substr() function : usage variations - pass different integers to $length arg
3--SKIPIF--
4<?php
5extension_loaded('mbstring') or die('skip');
6function_exists('mb_substr') or die("skip mb_substr() is not available in this build");
7?>
8--FILE--
9<?php
10/*
11 * Test how mb_substr() behaves when passed a range of integers as $length argument
12 */
13
14echo "*** Testing mb_substr() : usage variations ***\n";
15
16mb_internal_encoding('UTF-8');
17
18$string_ascii = '+Is an English string'; //21 chars
19
20//Japanese string, 21 characters
21$string_mb = base64_decode('5pel5pys6Kqe44OG44Kt44K544OI44Gn44GZ44CCMDEyMzTvvJXvvJbvvJfvvJjvvJnjgII=');
22
23/*
24 * Loop through integers as multiples of ten for $offset argument
25 * 60 is larger than *BYTE* count for $string_mb
26 */
27for ($i = -60; $i <= 60; $i += 10) {
28    if (@$a || @$b) {
29        $a = null;
30        $b = null;
31    }
32    echo "\n**-- Offset is: $i --**\n";
33    echo "-- ASCII String --\n";
34    $a = mb_substr($string_ascii, 1, $i);
35    if ($a !== false) {
36       var_dump(bin2hex($a));
37    }
38    else {
39       var_dump($a);
40    }
41    echo "--Multibyte String --\n";
42    $b = mb_substr($string_mb, 1, $i, 'UTF-8');
43    if (strlen($a) == mb_strlen($b, 'UTF-8')) { // should return same length
44        var_dump(bin2hex($b));
45    } else {
46        echo "Difference in length of ASCII string and multibyte string\n";
47    }
48
49}
50
51echo "Done";
52?>
53--EXPECT--
54*** Testing mb_substr() : usage variations ***
55
56**-- Offset is: -60 --**
57-- ASCII String --
58string(0) ""
59--Multibyte String --
60string(0) ""
61
62**-- Offset is: -50 --**
63-- ASCII String --
64string(0) ""
65--Multibyte String --
66string(0) ""
67
68**-- Offset is: -40 --**
69-- ASCII String --
70string(0) ""
71--Multibyte String --
72string(0) ""
73
74**-- Offset is: -30 --**
75-- ASCII String --
76string(0) ""
77--Multibyte String --
78string(0) ""
79
80**-- Offset is: -20 --**
81-- ASCII String --
82string(0) ""
83--Multibyte String --
84string(0) ""
85
86**-- Offset is: -10 --**
87-- ASCII String --
88string(20) "497320616e20456e676c"
89--Multibyte String --
90string(56) "e69cace8aa9ee38386e382ade382b9e38388e381a7e38199e3808230"
91
92**-- Offset is: 0 --**
93-- ASCII String --
94string(0) ""
95--Multibyte String --
96string(0) ""
97
98**-- Offset is: 10 --**
99-- ASCII String --
100string(20) "497320616e20456e676c"
101--Multibyte String --
102string(56) "e69cace8aa9ee38386e382ade382b9e38388e381a7e38199e3808230"
103
104**-- Offset is: 20 --**
105-- ASCII String --
106string(40) "497320616e20456e676c69736820737472696e67"
107--Multibyte String --
108string(100) "e69cace8aa9ee38386e382ade382b9e38388e381a7e38199e380823031323334efbc95efbc96efbc97efbc98efbc99e38082"
109
110**-- Offset is: 30 --**
111-- ASCII String --
112string(40) "497320616e20456e676c69736820737472696e67"
113--Multibyte String --
114string(100) "e69cace8aa9ee38386e382ade382b9e38388e381a7e38199e380823031323334efbc95efbc96efbc97efbc98efbc99e38082"
115
116**-- Offset is: 40 --**
117-- ASCII String --
118string(40) "497320616e20456e676c69736820737472696e67"
119--Multibyte String --
120string(100) "e69cace8aa9ee38386e382ade382b9e38388e381a7e38199e380823031323334efbc95efbc96efbc97efbc98efbc99e38082"
121
122**-- Offset is: 50 --**
123-- ASCII String --
124string(40) "497320616e20456e676c69736820737472696e67"
125--Multibyte String --
126string(100) "e69cace8aa9ee38386e382ade382b9e38388e381a7e38199e380823031323334efbc95efbc96efbc97efbc98efbc99e38082"
127
128**-- Offset is: 60 --**
129-- ASCII String --
130string(40) "497320616e20456e676c69736820737472696e67"
131--Multibyte String --
132string(100) "e69cace8aa9ee38386e382ade382b9e38388e381a7e38199e380823031323334efbc95efbc96efbc97efbc98efbc99e38082"
133Done
134