ereg to preg match

ereg to preg

[zpupster]

if (ereg ("(^[0-9][0-9][0-9]$|^[0-9][0-9][0-9][0-9]$)", $HTTP_POST_VARS['cvv_number']) == 1){

this ereg needs to e changed to
preg_match

i have done some of these with single quotes and commas i.e./,/
i do not know how to do this with double quotes

[lucy24]

Psst!
(^[0-9][0-9][0-9]$|^[0-9][0-9][0-9][0-9]$)
=
^\d\d\d\d?$
=
^\d{3,4}$

[penders]

i have done some of these with single quotes and commas i.e./,/
i do not know how to do this with double quotes

In this case it's exactly the same for double quotes. (Commas?)

You could simply "convert" this by adding the regex delimiters "/" on either end. But you might as well simplify the regex at the same time (which you could have done with POSIX regex as well). You are matching a 3 or 4 digit number.

if (preg_match('/^\d{3,4}$/', $_POST['cvv_number'])) {

If you are in the process of updating your code then consider changing $HTTP_POST_VARS as well, which is also deprecated.