Php - regular expression to check if the string has chinese chars

preg_match("/\p{Han}+/u", $utf8_str);

This just checks for the presence of at least one chinese character. You might want to expand on this if you want to match the complete string.

php regex string cjk

@mario answer is right!

For Chinese chars use this regex: /[\x{4e00}-\x{9fa5}]+/u

And Don't forget the u modifier!!!

About u modifier reference

TKS to mario

php regex string cjk

preg_match("/^\p{Han}{2,10}+$/u", $str);

Use /^\p{Han}{2,10}+$/u regex which allows Chinese character only.

You can change minimum and maximum character by changing {2,10} as per your need.

\p & /u are very important to add please don't avoid to add it.

CodeHunter