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|
--TEST--
Test mb_substr() function : usage variations - pass different integers to $start arg
--SKIPIF--
<?php
extension_loaded('mbstring') or die('skip');
function_exists('mb_substr') or die("skip mb_substr() is not available in this build");
?>
--FILE--
<?php
/*
* Test how mb_substr() behaves when passed a range of integers as $start argument
*/
echo "*** Testing mb_substr() : usage variations ***\n";
mb_internal_encoding('UTF-8');
$string_ascii = '+Is an English string'; //21 chars
$string_mb = base64_decode('5pel5pys6Kqe44OG44Kt44K544OI44Gn44GZ44CCMDEyMzTvvJXvvJbvvJfvvJjvvJnjgII='); //21 chars
/*
* Loop through integers as multiples of ten for $offset argument
* 60 is larger than *BYTE* count for $string_mb
*/
for ($i = -60; $i <= 60; $i += 10) {
if (@$a || @$b) {
$a = null;
$b = null;
}
echo "\n**-- Offset is: $i --**\n";
echo "-- ASCII String --\n";
$a = mb_substr($string_ascii, $i, 4);
var_dump(base64_encode($a));
echo "--Multibyte String --\n";
$b = mb_substr($string_mb, $i, 4, 'UTF-8');
if (strlen($a) == mb_strlen($b, 'UTF-8')) { // should return same length
var_dump(base64_encode($b));
} else {
echo "Difference in length of ASCII string and multibyte string\n";
}
}
echo "Done";
?>
--EXPECT--
*** Testing mb_substr() : usage variations ***
**-- Offset is: -60 --**
-- ASCII String --
string(8) "K0lzIA=="
--Multibyte String --
string(16) "5pel5pys6Kqe44OG"
**-- Offset is: -50 --**
-- ASCII String --
string(8) "K0lzIA=="
--Multibyte String --
string(16) "5pel5pys6Kqe44OG"
**-- Offset is: -40 --**
-- ASCII String --
string(8) "K0lzIA=="
--Multibyte String --
string(16) "5pel5pys6Kqe44OG"
**-- Offset is: -30 --**
-- ASCII String --
string(8) "K0lzIA=="
--Multibyte String --
string(16) "5pel5pys6Kqe44OG"
**-- Offset is: -20 --**
-- ASCII String --
string(8) "SXMgYQ=="
--Multibyte String --
string(16) "5pys6Kqe44OG44Kt"
**-- Offset is: -10 --**
-- ASCII String --
string(8) "aXNoIA=="
--Multibyte String --
string(8) "MTIzNA=="
**-- Offset is: 0 --**
-- ASCII String --
string(8) "K0lzIA=="
--Multibyte String --
string(16) "5pel5pys6Kqe44OG"
**-- Offset is: 10 --**
-- ASCII String --
string(8) "bGlzaA=="
--Multibyte String --
string(8) "MDEyMw=="
**-- Offset is: 20 --**
-- ASCII String --
string(4) "Zw=="
--Multibyte String --
string(4) "44CC"
**-- Offset is: 30 --**
-- ASCII String --
string(0) ""
--Multibyte String --
string(0) ""
**-- Offset is: 40 --**
-- ASCII String --
string(0) ""
--Multibyte String --
string(0) ""
**-- Offset is: 50 --**
-- ASCII String --
string(0) ""
--Multibyte String --
string(0) ""
**-- Offset is: 60 --**
-- ASCII String --
string(0) ""
--Multibyte String --
string(0) ""
Done
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