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/* Prototype  : string mb_substr(string $str, int $start [, int $length [, string $encoding]])
11 * Description: Returns part of a string
12 * Source code: ext/mbstring/mbstring.c
13 */
14
15/*
16 * Test how mb_substr() behaves when passed a range of integers as $length argument
17 */
18
19echo "*** Testing mb_substr() : usage variations ***\n";
20
21mb_internal_encoding('UTF-8');
22
23$string_ascii = b'+Is an English string'; //21 chars
24
25//Japanese string, 21 characters
26$string_mb = base64_decode('5pel5pys6Kqe44OG44Kt44K544OI44Gn44GZ44CCMDEyMzTvvJXvvJbvvJfvvJjvvJnjgII=');
27
28/*
29 * Loop through integers as multiples of ten for $offset argument
30 * 60 is larger than *BYTE* count for $string_mb
31 */
32for ($i = -60; $i <= 60; $i += 10) {
33	if (@$a || @$b) {
34		$a = null;
35		$b = null;
36	}
37	echo "\n**-- Offset is: $i --**\n";
38	echo "-- ASCII String --\n";
39	$a = mb_substr($string_ascii, 1, $i);
40	var_dump(base64_encode($a));
41	echo "--Multibyte String --\n";
42	$b = mb_substr($string_mb, 1, $i, 'UTF-8');
43	if (strlen($a) == mb_strlen($b, 'UTF-8')) { // should return same length
44		var_dump(base64_encode($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(16) "SXMgYW4gRW5nbA=="
89--Multibyte String --
90string(40) "5pys6Kqe44OG44Kt44K544OI44Gn44GZ44CCMA=="
91
92**-- Offset is: 0 --**
93-- ASCII String --
94string(0) ""
95--Multibyte String --
96string(0) ""
97
98**-- Offset is: 10 --**
99-- ASCII String --
100string(16) "SXMgYW4gRW5nbA=="
101--Multibyte String --
102string(40) "5pys6Kqe44OG44Kt44K544OI44Gn44GZ44CCMA=="
103
104**-- Offset is: 20 --**
105-- ASCII String --
106string(28) "SXMgYW4gRW5nbGlzaCBzdHJpbmc="
107--Multibyte String --
108string(68) "5pys6Kqe44OG44Kt44K544OI44Gn44GZ44CCMDEyMzTvvJXvvJbvvJfvvJjvvJnjgII="
109
110**-- Offset is: 30 --**
111-- ASCII String --
112string(28) "SXMgYW4gRW5nbGlzaCBzdHJpbmc="
113--Multibyte String --
114string(68) "5pys6Kqe44OG44Kt44K544OI44Gn44GZ44CCMDEyMzTvvJXvvJbvvJfvvJjvvJnjgII="
115
116**-- Offset is: 40 --**
117-- ASCII String --
118string(28) "SXMgYW4gRW5nbGlzaCBzdHJpbmc="
119--Multibyte String --
120string(68) "5pys6Kqe44OG44Kt44K544OI44Gn44GZ44CCMDEyMzTvvJXvvJbvvJfvvJjvvJnjgII="
121
122**-- Offset is: 50 --**
123-- ASCII String --
124string(28) "SXMgYW4gRW5nbGlzaCBzdHJpbmc="
125--Multibyte String --
126string(68) "5pys6Kqe44OG44Kt44K544OI44Gn44GZ44CCMDEyMzTvvJXvvJbvvJfvvJjvvJnjgII="
127
128**-- Offset is: 60 --**
129-- ASCII String --
130string(28) "SXMgYW4gRW5nbGlzaCBzdHJpbmc="
131--Multibyte String --
132string(68) "5pys6Kqe44OG44Kt44K544OI44Gn44GZ44CCMDEyMzTvvJXvvJbvvJfvvJjvvJnjgII="
133Done