PHP preg_match matching skills for multiple languages

Regular: [\S]{2,32}

Filtering works
In PHP:

<?php
var_dump( preg_match("/[\S\b]{2,32}/",&#39;ج&#39;) );
echo &#39;<hr />&#39;;
var_dump( preg_match("/[\S\b]{2,32}/",&#39;中国&#39;) );

doesn’t work

You need to add a parameter u, read the code according to uniode

<?php
var_dump( preg_match("/[\S\b]{2,32}/u",&#39;ج&#39;) );
echo &#39;<hr />&#39;;
var_dump( preg_match("/[\S\b]{2,32}/u",&#39;中国&#39;) );
echo &#39;<hr />&#39;;
var_dump( preg_match("/[\S\b]{2,32}/u",&#39;Дракон&#39;) );
echo &#39;<hr />&#39;;
var_dump( preg_match("/[\S\b]{2,32}/u",&#39;cc&#39;) );

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