preg match

[NZ_Kiwis]

I want to match 6 numbers with a / and another 6 numbers.

123456/123456

If a user enteres anything other than this i want it to return an error, how can I do this?

[NogDog]

if(preg_match('#^[0-9]{6}/[0-9]{6}$#', $text)) {
   // valid
}
else {
   // not valid
}

[NZ_Kiwis]

thanks, what is the # and the ^ for?

[bradgrafelman]

The # is being used as the expression delimiter, and the '^' (in the context that it appears) is used to denote the beginning of a line (it's the compliment of '$' which, in the context that it appears, is being used to denote the end of a line).