gmp_sign

Hi !

If you don't have the GMP extension, the sign function is really simple to code.
Here an example of implementation :

<?php
function sign( $number ) {
    return ( $number > 0 ) ? 1 : ( ( $number < 0 ) ? -1 : 0 );
}

echo sign( 500 ); // Return 1
echo sign( -500 ); // Return -1
echo sign( 0 ); // Return 0
?>

Thomas.

Using a spaceship in PHP7:

<?php
$sign = $number <=> 0;
?>