PHP uses regular expressions to verify Chinese_php tips

php uses preg_match to match and determine whether a string contains Chinese or is all Chinese as follows:

$str = 'php学习博客';
if(preg_match('/[\x7f-\xff]/', $str)){
 echo '字符串中有中文<br/>';
}else{
 echo '字符串中没有中文<br/>';
}

if(preg_match('/^[\x7f-\xff]+$/', $str)){
 echo '字符串全是中文';
}else{
 echo '字符串不全是中文';
}

The output result of the above program is:

There is Chinese in the string
The strings are not all in Chinese

It has been tested under utf-8 and gbk encoding, and both can be used.