PHP regular expression - filter number only

Question

I know this might sound as really dummy question, but I\'m trying to ensure that the provided string is of a number / decimal format to use it later on with PHP\'s number_fo

Answer 1

Using is_numeric or intval is likely the best way to validate a number here, but to answer your question you could try using preg_replace instead. This example removes all non-numeric characters:

$output = preg_replace( '/[^0-9]/', '', $string );