regular expression for numeric test

[Anon]

Hello

I am new to regualr expression.

I tried to verify an html input, test whether it is numeric with max 2 decimal places : like 9,999.99 (user may or may not enter decimal places, comma and a dot)

Can anyone help how to construct a regular expression for ereg() function ?

Or are there any PHP functions out there to perform similar task ?

Thanks

[Anon]

if(ereg('[0-9]{0,2}(,[0-9]{3})(.[0-9]{2})?|[0-9](.[0-9]{2})?',$var)

or

$commaless=str_replace(',','',$var);
if(is_numeric($commaless) && round($commaless,2)==$commaless)

[tomhath]

Hmmm, never trust a programmer to test his own code. The regex would probably work if it was anchored to the beginning and end of the line. It's happy as long as there is a legal number in there somewhere...

$var = "Hello Heyley ,9999.330000000000000000000000000001xxxx";

if (ereg('[0-9]{0,2}(,[0-9]{3})(.[0-9]{2})?|[0-9](.[0-9]{2})?',$var) ) {
echo "--->$var<--- passed ";
}

Prints out:

--->Hello Heyley ,9999.330000000000000000000000000001xxxx<--- passed

[Anon]

Yes, the anchors should be there - I was kinda assuming that the alleged numeric term was all there was.

Test? Waddayamean, test? I never test the stuff I put here!