How to get only Chinese characters in php

Preg_match_all() can be used with regular expressions to filter strings in php and only obtain Chinese characters; the syntax is "preg_match_all("/[\x{4e00}-\x{9fff}] /u","$ str",$arr);", the matching characters will be stored in the "$arr" array.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

In php, you can use preg_match_all () function to get only Chinese characters.

preg_match_all() function will search for all results in the string that can match the regular expression

preg_match_all() function matches the regular expression "/[\x{4e00}-\x{9fff}] /u" can filter the string and only get Chinese characters.

will store the matching Chinese characters one by one into an array (the array is specified by the third parameter).

<?php
header("Content-type:text/html;charset=utf-8");
$str = "欢迎4546来到php这里。zblog,我的?#$%^天呀&())*(&^";
echo $str;
preg_match_all("/[\x{4e00}-\x{9fff}]+/u","$str",$arr);
var_dump($arr);
?>

The result value can then be spliced ​​into a string using the join() function.

<?php
header("Content-type:text/html;charset=utf-8");
$str = "欢迎4546来到php这里。zblog,我的?#$%^天呀&())*(&^";
echo $str;
preg_match_all("/[\x{4e00}-\x{9fff}]+/u","$str",$arr);
var_dump($arr);
echo join(&#39;&#39;,$arr[0]);
?>

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