/**
* 字符串转数组
* @param type $str
* @return type
*/
public static function ch2arr($str) {
$length = mb_strlen($str, 'utf-8');
$array = [];
for ($i = 0; $i < $length; $i++)
$array[] = mb_substr($str, $i, 1, 'utf-8');
return $array;
}文章地址：http://www.cnblogs.com/yamtsin/p/5961148.html
关键字词:
