PHP正则表达式相关

Posted 2020-06-08

<?php

    $str = "aa11bb2cc3dd4";

    $reg = "/\d/";
    
    //$str = preg_replace($reg,"#",$str); //将满足正则表达式的内容替换为#
    
    //$arr = preg_split($reg,$str);//拆分字符串
    //preg_match($reg,$str,$arr); //匹配第一个满足正则表达式的内容，放到数组$arr里面
    
    //preg_match_all($reg,$str,$arr);//匹配所有满足条件的
    
    $arr = array(1,2,"aa","cc");
    
    //$array = preg_grep($reg,$arr); //匹配数组里面满足条件的
    
    echo print_r($array);
    
?>