PHP: How to sanitize a natural number (positive INT)?

Question

From PHP sanitize filters, there is one option for sanitizing integers:

FILTER_SANITIZE_NUMBER_INT - delete all characters except digits, plus and minus.

If we use:

filter_var($var2San, FILTER_SANITIZE_NUMBER_INT);

This will clear the points .and commas ,, but the signs are +and -will remain. For example: ++++ --- 1.110,4 <b>m<sup>2</sup></b>disinfected before ++++---111042. Ideally, it filter_varwill return falsewhen the number is 0, that is, the number should be a natural number , or rather a positive integer.

So a FILTER_SANITIZE_NUMBER_NATURALwould be convenient ... Is there a workaround for this, or do I need RegExp?

Answer 1

, filter_var:

filter_var($var2San, FILTER_VALIDATE_INT,
           array('options' => array('min_range' => 1)));

FILTER_ VALIDATE _INT PHP ( $options), filter_var , , FALSE . :

• -1 → FALSE
• 0 → FALSE
• 1 → 1
• + 1 → FALSE
• +2 → 2
• ++3 → FALSE
• 4+ → FALSE
• 5.6 → FALSE
• 7,8 → FALSE

, , , ( - , , + ). +, .

, 2147483647, FALSE ( 32- ).