is_numeric question

[fubowl]

Taken from http://php.net/manual/en/function.is-numeric.php

 

<?php
$tests = array(
        "42", 
        1337, 
        "1e4", 
        "not numeric", 
        Array(), 
        9.1
        );

foreach ($tests as $element) {
    if (is_numeric($element)) {
        echo "'{$element}' is numeric", PHP_EOL;
    } else {
        echo "'{$element}' is NOT numeric", PHP_EOL;
    }
}
?>

 

Outputs:

'42' is numeric

'1337' is numeric

'1e4' is numeric

'not numeric' is NOT numeric

'Array' is NOT numeric

'9.1' is numeric

 

WHY does 1e4 validate as TRUE using is_numeric?

 

[Pikachu2000]

It's an exponential number.

[fubowl]

Ha. I see. Well I guess I'd have to use a different function since I don't see a way of removing that option. Thanks.

[Pikachu2000]

I think you're probably looking for ctype_digit()

[Andy-H]

filter_var

 

$options['options']['min_range'] = 0;
$options['options']['max_range'] = 1337000;
$options['options']['default']   = 0;

if ( filter_var($intVar, FILTER_VALIDATE_INT) )
{
   // valid integer between 0 and 1337000
}
else
{
   // filter failed and returned 0
}

[salathe]

Andy-H, you might want to use the $options in the call to filter_var().

 

(P.S. If Andy edits his post, this won't make much sense.)

[Andy-H]

haha duhh 

 

Well spotted

[fubowl]

I think you're probably looking for ctype_digit()

 

Certainly. Thanks Pikachu2000.