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.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
