(PHP)正则表达式-preg_grep函数用法

<?php
/**
* Created by PhpStorm.
* User: Ollydebug
* Date: 2015/11/13
* Time: 22:55
*/

//阉割版preg_filter
//preg_grep函数只会去做匹配的操作，不做替换

$pattern = '/[0-9]/';
$subject = array('weuy','r3ui','76as83','s','0ck9');

$arr = preg_grep($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;
}
}

?>