PHP filters out non-Chinese characters and retains only Chinese Characters

PHP filters out non-Chinese characters and retains only Chinese Characters

This article mainly introduces how to filter out non-Chinese Characters in PHP and retain only Chinese characters. This article provides the implementation code directly. For more information, see

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<? Php   $ Str = "a 1b 2b <Chinese>. Xxyy character ";   // Convert 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]);   // Conversion UTF-8-> GB2312 $ Str = mb_convert_encoding ($ str, 'gb2312', 'utf-8 ');   Echo $ str; // output Chinese Characters   ?>