PHP implements filtering out non-Chinese characters and only retaining Chinese characters, _PHP tutorial

PHP implements filtering out non-Chinese characters and only retaining Chinese characters,

<&#63;php

$str = "a 1b 2b＜中文＞。xxyy字符";

//转换 GB2312 -> UTF-8
$str = mb_convert_encoding($str, 'UTF-8', 'GB2312');

preg_match_all('/[\x{4e00}-\x{9fff}]+/u', $str, $matches);
$str = join('', $matches[0]);

//转换 UTF-8 -> GB2312
$str = mb_convert_encoding($str, 'GB2312', 'UTF-8'); 

echo $str; //输出 中文字符

&#63;>

http://www.bkjia.com/PHPjc/1011952.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/1011952.htmlTechArticlePHP implements filtering out non-Chinese characters and retaining only Chinese characters, php$str = "a 1b 2b. xxyy characters";//Convert GB2312 - UTF-8$str = mb_convert_encoding($str, 'UTF-8', 'GB2312');pr...