Since the Chinese ASCII code has a certain range. So you can represented Chinese with the following regular expressions.
/ ^ [CHR (0xA1) -Chr (0xFF)] $ /
Here is an example of use:
$ Str = "Beyond PHP"; if (preg_match ("/ ^ [". "-". chr (0xff). "] $ /"] / ", $ str) {echo" This is a pure Chinese string ";} else {echo" This is not a pure Chinese string ";
