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run code in 150+ php & hhvm versions
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<?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, 0.000001);
Output for 4.3.0 - 7.1.0