PHP按字符串長度分割成數組,支持中文

 

/**
 * 將unicode字符串按傳入長度分割成數組
 * @param  string  $str 傳入字符串
 * @param  integer $l   字符串長度
 * @return mixed      數組或false
 */
 function str_split_unicode($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);
 }

 

<?php
 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);
 }
 ?>
 $s = "還未如願sss見gfg者不rtret不朽"; // Mild milk
 print_r(str_split($s, 5));
 print_r(str_split_unicode($s, 5));

 //輸出
 //Array ( [0] => 還�� [1] => �如� [2] => ��sss [3] => 見gf [4] => g者� [5] => ��rtr [6] => et不 [7] => 朽 )
 //Array ( [0] => 還未如願s [1] => ss見gf [2] => g者不rt [3] => ret不朽 )