问题
This is the regex I\'m trying to use:
/^(\\w|\\.|-)+?@(\\w|-)+?\\.\\w{2,4}($|\\.\\w{2,4})$/gim
I found it on this site, and it works great when I try it out there. But as soon as I place it in my code, I get this message:
Warning: preg_match() [function.preg-match]: Unknown modifier \'g\' in C:\\xampp\\htdocs\\swebook\\includes\\classes.php on line 22
Can anyone explain what\'s wrong, and why it\'s working on that website and not in my code?
回答1:
There is no modifier g for preg_match. Instead, you have to use the preg_match_all function.
So instead of:
preg_match("/^(\w|\.|-)+?@(\w|-)+?\.\w{2,4}($|\.\w{2,4})$/gim", ....)
use:
preg_match_all("/^(\w|\.|-)+?@(\w|-)+?\.\w{2,4}($|\.\w{2,4})$/im", ....)
来源：https://stackoverflow.com/questions/3578671/unknown-modifier-g-in-when-using-preg-match-in-php