note 123122 deleted from function.usort by cmb

Note Submitter: Patrick ---- Note that <?php $array = ['valA', 'valB', 'valC']; $x = 1; /* this means valA > valC (try -1 for valA < valC) */ usort($array, function($val1, $val2) use ($x) { if ($val1 == 'valA' && $val2 == 'valB') return (0); if ($val1 == 'valA' && $val2 == 'valC') return ($x); if ($val1 == 'valB' && $val2 == 'valC') return (0); }); print_r($array); // result: [valA, valB, valC] ?> will lead to the same (potentially unintended) result ([valA, valB, valC]), regardless of whether $x=1 or $x=-1. This is because PHP only compares the pairs (valA, valB) and (valB, valC) if it finds that both of them are supposed to be equal, as it assumes the sorting function to be transitive.