validating currency in text field

[CORT0619]

Does anyone know how I can validate US currency using php that is entered into a textbox? The textbox is setup as a decimal in mysql and i'm trying to make sure only decimals are entered so when php calculates the values entered I don't receive errors.

[phporcaffeine]

<?php
$value = 32.50;
$isValid = filter_var($value, FILTER_VALIDATE_FLOAT);

//RETURNS TRUE ON SUCCESSFULL VALIDATION, FALSE FOR UNSUCCESSFUL
//THIS WILL EVALUATE FOR A DECIMAL (FLOAT), THERE ARE ADDITIONAL FLAG IS YOU WANT TO VET OUT TO THE THOUSANDS PLACE

?>

 

Read up on filter_var() and its constants here: http://us3.php.net/manual/en/filter.filters.php

 

filter_var() is still invoking the PCRE engine; so your still getting the benefit of REGEX, without all the guess work.