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when using the Drupal FAPI and needing a float number field you have to use type textfield. What's the best way to validate that this data is a float during hook_form_validate9)? Is there a built in function. or do you have to do is_float()?

Thanks.

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Drupal does not have an is_float() wrapper function. So yes, if you want to check to see if a string is a float, use PHP's native is_float().

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