(PHP)Regex-preg_replace()和preg_filter()

<?php/** * Regex練習 * User: Ollydebug * Date: 2015/11/13 * Time: 13:28 *//* * preg_replace()不論發不發生替換，值都保留. * preg_filter()只保留髮生替換的值. */$pattern = array('/[0123]/','/[456]/','/[789]/');$subject = array("weuy","r3ui","76as83","s","0ck9");$replacement = array('百','小','度');$str1 = preg_replace($pattern,$replacement,$subject);$str2 = preg_filter($pattern,$replacement,$subject);show($str1);echo '<hr/>';show($str2);function show($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;    }}?>

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