(PHP)正则表达式-preg_split函数的用法

<?php/** * Created by PhpStorm. * User: Ollydebug * Date: 2015/11/15 * Time: 10:13 *///preg_split-升级版explode函数//preg_split的主要意思是通过一个正则表达式分割字符串$pattern = '/[0-9]/';$subject = '钻3石2星5尘4拳';$arr = preg_split($pattern,$subject);show($arr);function show($var){    if(empty($var)){        echo 'null';    }elseif(is_array($var)||is_object($var)){        // array,object        echo '<pre>';        print_r($var);        echo '</pre>';    }else{        //string,int,float        echo $var;    }}?>