Warning: preg_match() [function.preg-match]: Unknown modifier '-' [duplicate]

问题

This question already has answers here:

Warning: preg_replace(): Unknown modifier ']' (3 answers)

Closed 5 months ago.

I change ereg to preg_match for update mycode to PHP5.3 . now i see this warning in my page. how to fix this ?

warning :

Warning: preg_match() [function.preg-match]: Unknown modifier '-' in C:\xampp\htdocs\share\configs\functions.php on line 2645

old Code :

if (!ereg ("([0-9]{4})-([0-9]{1,2})-([0-9]{1,2})", $dateOfBirth, $regs))

New Code (PHP 5.3):

if (!preg_match ("([0-9]{4})-([0-9]{1,2})-([0-9]{1,2})", $dateOfBirth, $regs))

Thanks

回答1:

You need to add delimiters:

if (!preg_match ("/([0-9]{4})-([0-9]{1,2})-([0-9]{1,2})/", $dateOfBirth, $regs))
#                 ^                                    ^

来源：https://stackoverflow.com/questions/11665632/warning-preg-match-function-preg-match-unknown-modifier