Convert boolean to integer value php

Question

Is there any builtin function for PHP that will take a boolean value and return its integer equivalent? 0 for FALSE, 1 for TRUE? Of course you can easily create a function to do

Answer 1

If you are unsure of the data type see the example below, it works on strings, integers and booleans.

<?php

$options = [ TRUE, FALSE, 'true', 'false', 1, 0, '1', '0', 'on', 'off', 'yes', 'no' ];

foreach ( $options as $option ) {
    $bool = filter_var( $option, FILTER_VALIDATE_BOOLEAN ); // TRUE or FALSE
    print (int) $bool . ' '; // 1 or 0
} 
// Outputs: 1 0 1 0 1 0 1 0 1 0 1 0 

?>

filter_var( $var, FILTER_VALIDATE_BOOLEAN ) will return bool(true) or bool(false) then simply cast as integer.

filter_var()

(PHP 5 >= 5.2.0, PHP 7)

filter_var — Filters a variable with a specified filter