CODEWITHSUNDEEP
phpvalidation
Olda Stiller
Olda Stiller

Reputation: 65

PHP validate float via IS_FLOAT

I need to validate inputs - find out, if inputs are float. According to websites, my code should work, but it doesnt. 

<?php
$new_estimate=array("3.3","10.3","1.1","2.35");
$mistake="no";

for ($i=0; $i<(sizeof($new_estimate)); $i++)
    {
       if (!is_float($new_estimate[$i]))
         {
         $mistake="yes";
         }
    }

echo $mistake;
?>

I think all values of array are float, but browser shows "yes" - instead my expectation. I dont understand, why it doesnt work.

Upvotes: 0

Views: 197

Answers (2)

Danijel
Danijel

Reputation: 12689

It is because is_float() checks if the type of a variable is float, and you are working with an array of string values. To validate inputs you can use filter_var() as in example below.

$new_estimate = array( "3.3", "10.3", "1.1", "2.35" );

$mistake = (bool) array_filter( $new_estimate, function( $item ) {
    return !filter_var( $item, FILTER_VALIDATE_FLOAT );
});

Upvotes: 2

dersvenhesse
dersvenhesse

Reputation: 6404

This are strings in your array, if you'd like them to be floats remove the " around the numbers. If you intend to check for numbers instead of the concrete type, use is_numeric (Documentation).

$new_estimate = array(3.3, 10.3, 1.1, 2.35);

Furthermore, instead using the strings "yes" and "no" for $mistake, set them true or false and use the variable as a boolean.

Upvotes: 1

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