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, $i);
40	if ($a !== false) {
41	   var_dump(bin2hex($a));
42	}
43	else {
44	   var_dump($a);
45	}
46	echo "--Multibyte String --\n";
47	$b = mb_substr($string_mb, 1, $i, 'UTF-8');
48	if (strlen($a) == mb_strlen($b, 'UTF-8')) { // should return same length
49		var_dump(bin2hex($b));
50	} else {
51		echo "Difference in length of ASCII string and multibyte string\n";
52	}
53
54}
55
56echo "Done";
57?>
58--EXPECT--
59*** Testing mb_substr() : usage variations ***
60
61**-- Offset is: -60 --**
62-- ASCII String --
63string(0) ""
64--Multibyte String --
65string(0) ""
66
67**-- Offset is: -50 --**
68-- ASCII String --
69string(0) ""
70--Multibyte String --
71string(0) ""
72
73**-- Offset is: -40 --**
74-- ASCII String --
75string(0) ""
76--Multibyte String --
77string(0) ""
78
79**-- Offset is: -30 --**
80-- ASCII String --
81string(0) ""
82--Multibyte String --
83string(0) ""
84
85**-- Offset is: -20 --**
86-- ASCII String --
87string(0) ""
88--Multibyte String --
89string(0) ""
90
91**-- Offset is: -10 --**
92-- ASCII String --
93string(20) "497320616e20456e676c"
94--Multibyte String --
95string(56) "e69cace8aa9ee38386e382ade382b9e38388e381a7e38199e3808230"
96
97**-- Offset is: 0 --**
98-- ASCII String --
99string(0) ""
100--Multibyte String --
101string(0) ""
102
103**-- Offset is: 10 --**
104-- ASCII String --
105string(20) "497320616e20456e676c"
106--Multibyte String --
107string(56) "e69cace8aa9ee38386e382ade382b9e38388e381a7e38199e3808230"
108
109**-- Offset is: 20 --**
110-- ASCII String --
111string(40) "497320616e20456e676c69736820737472696e67"
112--Multibyte String --
113string(100) "e69cace8aa9ee38386e382ade382b9e38388e381a7e38199e380823031323334efbc95efbc96efbc97efbc98efbc99e38082"
114
115**-- Offset is: 30 --**
116-- ASCII String --
117string(40) "497320616e20456e676c69736820737472696e67"
118--Multibyte String --
119string(100) "e69cace8aa9ee38386e382ade382b9e38388e381a7e38199e380823031323334efbc95efbc96efbc97efbc98efbc99e38082"
120
121**-- Offset is: 40 --**
122-- ASCII String --
123string(40) "497320616e20456e676c69736820737472696e67"
124--Multibyte String --
125string(100) "e69cace8aa9ee38386e382ade382b9e38388e381a7e38199e380823031323334efbc95efbc96efbc97efbc98efbc99e38082"
126
127**-- Offset is: 50 --**
128-- ASCII String --
129string(40) "497320616e20456e676c69736820737472696e67"
130--Multibyte String --
131string(100) "e69cace8aa9ee38386e382ade382b9e38388e381a7e38199e380823031323334efbc95efbc96efbc97efbc98efbc99e38082"
132
133**-- Offset is: 60 --**
134-- ASCII String --
135string(40) "497320616e20456e676c69736820737472696e67"
136--Multibyte String --
137string(100) "e69cace8aa9ee38386e382ade382b9e38388e381a7e38199e380823031323334efbc95efbc96efbc97efbc98efbc99e38082"
138Done