Online PHP editor | refs for okJ6S

<?php define('✓', true); define('✕', false); function ≠($left, $right) { return $left != $right; } function ≅($left, $right) { return ($left > $right - 0.0001) && ($left < $right + 0.0001); } function ≡($left, $right) { return $left === $right; } function ≢($left, $right) { return $left !== $right; } $a = 1; $b = 2 - 1; echo ≡($a, $b)."\n"; echo ≅($a, $a + 0.000001)."\n";