Posted by Robin Vickery on 09/06/05 10:35

On 9/6/05, Cabbar Duzayak <cabbar@gmail.com> wrote:
> Hi,
>
> I have a regular expression check as:
>
> preg_match("/$xyz/", $data, $matches);
>
> And, as you know $xyz means "string starts with xyz".

No it doesn't - "string starts with xyz" would be "/^xyz/" which
coincidentally avoids your problem of xyz being interpreted as a
variable name.

More generally, if you don't want $xyz interpreted as a variable, then
use single quotes - or if you must use double quotes, then escape the
$ with a backslash.

-robin

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