Detailed introduction on how to write this regular expression to split strings

How to write this regular expression to split a string

<pre class="brush:php;toolbar:false">
php > $x="xy\nw";
php > echo strlen($x);4

How to split it into an array of four characters?

Reply content:

str_split

Come on ajs

'xynw'.match(/(.{1})/g)

<?php
$str = &#39;xynw&#39;;
$chars = preg_split(&#39;//&#39;, $str, -1,PREG_SPLIT_NO_EMPTY);
print_r($chars);?>

If you directly want to get a certain character, the string can be accessed directly using an array-like method. If you have other reasons to convert to an array, just ignore me. answer.