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run code in 150+ php & hhvm versions
Bugs & Features
<?php $str = "Hello Friend统计" ; print_r(explode(' ',$str)); $arr1 = str_split ( $str ); $arr2 = str_split ( $str , 3 );//按3个字节分割 print_r($arr1); print_r($arr2); function str_split_unicode($str, $l = 0) { if ($l > 0) { $ret = array(); $len = mb_strlen($str, "UTF-8"); for ($i = 0; $i < $len; $i += $l) { $ret[] = mb_substr($str, $i, $l, "UTF-8"); } return $ret; } return preg_split("//u", $str, -1, PREG_SPLIT_NO_EMPTY); } $s = '无符号整数'; // Open Source! print_r(str_split_unicode($s)); print_r(str_split_unicode($s, 3));
Output for 5.0.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
Array ( [0] => Hello [1] => Friend统计 ) Array ( [0] => H [1] => e [2] => l [3] => l [4] => o [5] => [6] => F [7] => r [8] => i [9] => e [10] => n [11] => d [12] => � [13] => � [14] => � [15] => � [16] => � [17] => � ) Array ( [0] => Hel [1] => lo [2] => Fri [3] => end [4] => 统 [5] => 计 ) Array ( [0] => 无 [1] => 符 [2] => 号 [3] => 整 [4] => 数 ) Array ( [0] => 无符号 [1] => 整数 )
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.4.5 - 4.4.9
Array ( [0] => Hello [1] => Friend统计 ) Fatal error: Call to undefined function: str_split() in /in/uRnT3 on line 4
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Array ( [0] => Hello [1] => Friend统计 ) Fatal error: Call to undefined function: str_split() in /in/uRnT3 on line 4
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Array ( [0] => Hello [1] => Friend统计 ) Fatal error: Call to undefined function: str_split() in /in/uRnT3 on line 4