PHP that supports Chinese is divided into array codes according to the length of the string, _PHP tutorial

Support Chinese PHP to split into array codes according to string length,

The following is the code I wrote to split Chinese and English mixed characters:

<&#63;php
function mbStrSplit ($string, $len=1) {
  $start = 0;
  $strlen = mb_strlen($string);
  while ($strlen) {
    $array[] = mb_substr($string,$start,$len,"utf8");
    $string = mb_substr($string, $len, $strlen,"utf8");
    $strlen = mb_strlen($string);
  }
  return $array;
}

header('Content-type:text/html;charset=utf-8');
$str = '我爱北京3我爱上海-我爱xianggang';
$r = mbStrSplit($str, 4);
echo '<pre class="brush:php;toolbar:false">';
print_r($r);
echo '

'; ?>

Run result:

Array
(
  [0] => 我爱北京
  [1] => 3我爱上
  [2] => 海-我爱
  [3] => xian
  [4] => ggan
  [5] => g
)

<&#63;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);
}
&#63;>
 $s ="还未如愿sss见gfg者不rtret不朽"; // Mild milk
 print_r(str_split($s, 5));
 print_r(str_split_unicode($s, 5));

//输出
 //Array ( [0] => 还&#65533;&#65533; [1] => &#65533;如&#65533; [2] => &#65533;&#65533;sss [3] => 见gf [4] => g者&#65533; [5] => &#65533;&#65533;rtr [6] => et不 [7] => 朽 )
 //Array ( [0] => 还未如愿s [1] => ss见gf [2] => g者不rt [3] => ret不朽 )

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