php使用自定义函数实现汉字分割替换功能示例

header("content-type:text/html;charset=utf-8");
$str="赵钱孙";
function mbstringtoarray($str,$charset) {
  $strlen=mb_strlen($str);
  while($strlen){
    $array[]=mb_substr($str,0,1,$charset);
    $str=mb_substr($str,1,$strlen,$charset);
    $strlen=mb_strlen($str);
  }
  return $array;
}
//用法gbk utf-8
$arr = mbstringtoarray($str,"utf-8");
var_dump($arr);

array(3) {
 [0]=>
 string(2) "赵"
 [1]=>
 string(2) "钱"
 [2]=>
 string(2) "孙"
}