1--TEST--
2Test mb_substr() function : usage variations - pass different integers to $length arg
3--EXTENSIONS--
4mbstring
5--FILE--
6<?php
7/*
8 * Test how mb_substr() behaves when passed a range of integers as $length argument
9 */
10
11echo "*** Testing mb_substr() : usage variations ***\n";
12
13mb_internal_encoding('UTF-8');
14
15$string_ascii = '+Is an English string'; //21 chars
16
17//Japanese string, 21 characters
18$string_mb = base64_decode('5pel5pys6Kqe44OG44Kt44K544OI44Gn44GZ44CCMDEyMzTvvJXvvJbvvJfvvJjvvJnjgII=');
19
20/*
21 * Loop through integers as multiples of ten for $offset argument
22 * 60 is larger than *BYTE* count for $string_mb
23 */
24for ($i = -60; $i <= 60; $i += 10) {
25    if (@$a || @$b) {
26        $a = null;
27        $b = null;
28    }
29    echo "\n**-- Offset is: $i --**\n";
30    echo "-- ASCII String --\n";
31    $a = mb_substr($string_ascii, 1, $i);
32    if ($a !== false) {
33       var_dump(bin2hex($a));
34    }
35    else {
36       var_dump($a);
37    }
38    echo "--Multibyte String --\n";
39    $b = mb_substr($string_mb, 1, $i, 'UTF-8');
40    if (strlen($a) == mb_strlen($b, 'UTF-8')) { // should return same length
41        var_dump(bin2hex($b));
42    } else {
43        echo "Difference in length of ASCII string and multibyte string\n";
44    }
45
46}
47
48echo "Done";
49?>
50--EXPECT--
51*** Testing mb_substr() : usage variations ***
52
53**-- Offset is: -60 --**
54-- ASCII String --
55string(0) ""
56--Multibyte String --
57string(0) ""
58
59**-- Offset is: -50 --**
60-- ASCII String --
61string(0) ""
62--Multibyte String --
63string(0) ""
64
65**-- Offset is: -40 --**
66-- ASCII String --
67string(0) ""
68--Multibyte String --
69string(0) ""
70
71**-- Offset is: -30 --**
72-- ASCII String --
73string(0) ""
74--Multibyte String --
75string(0) ""
76
77**-- Offset is: -20 --**
78-- ASCII String --
79string(0) ""
80--Multibyte String --
81string(0) ""
82
83**-- Offset is: -10 --**
84-- ASCII String --
85string(20) "497320616e20456e676c"
86--Multibyte String --
87string(56) "e69cace8aa9ee38386e382ade382b9e38388e381a7e38199e3808230"
88
89**-- Offset is: 0 --**
90-- ASCII String --
91string(0) ""
92--Multibyte String --
93string(0) ""
94
95**-- Offset is: 10 --**
96-- ASCII String --
97string(20) "497320616e20456e676c"
98--Multibyte String --
99string(56) "e69cace8aa9ee38386e382ade382b9e38388e381a7e38199e3808230"
100
101**-- Offset is: 20 --**
102-- ASCII String --
103string(40) "497320616e20456e676c69736820737472696e67"
104--Multibyte String --
105string(100) "e69cace8aa9ee38386e382ade382b9e38388e381a7e38199e380823031323334efbc95efbc96efbc97efbc98efbc99e38082"
106
107**-- Offset is: 30 --**
108-- ASCII String --
109string(40) "497320616e20456e676c69736820737472696e67"
110--Multibyte String --
111string(100) "e69cace8aa9ee38386e382ade382b9e38388e381a7e38199e380823031323334efbc95efbc96efbc97efbc98efbc99e38082"
112
113**-- Offset is: 40 --**
114-- ASCII String --
115string(40) "497320616e20456e676c69736820737472696e67"
116--Multibyte String --
117string(100) "e69cace8aa9ee38386e382ade382b9e38388e381a7e38199e380823031323334efbc95efbc96efbc97efbc98efbc99e38082"
118
119**-- Offset is: 50 --**
120-- ASCII String --
121string(40) "497320616e20456e676c69736820737472696e67"
122--Multibyte String --
123string(100) "e69cace8aa9ee38386e382ade382b9e38388e381a7e38199e380823031323334efbc95efbc96efbc97efbc98efbc99e38082"
124
125**-- Offset is: 60 --**
126-- ASCII String --
127string(40) "497320616e20456e676c69736820737472696e67"
128--Multibyte String --
129string(100) "e69cace8aa9ee38386e382ade382b9e38388e381a7e38199e380823031323334efbc95efbc96efbc97efbc98efbc99e38082"
130Done
131