- abs: documentation ( source)
<?php
function isEqual($a, $b, $epsilon = 1e-10) {
$a = floatval($a);
$b = floatval($b);
/*if ( $a == $b ) // handles infinites
return true;*/
if ( $a * $b == 0 ) // a or b or both are zero
return abs($a - $b) < ( $epsilon * $epsilon );
return (abs($a - $b) / (abs($a) + abs($b))) < $epsilon;
}
for ( $i = 0; $i < 10000; $i++ )
isEqual(0.000001, 0.0000011);