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<?php $a = range(-10, 10); $b = range(-10, 10, 0.2); $opResults = []; $funcResults = []; foreach($a as $_a) { foreach($b as $_b) { $opResults[] = $a ** $b; $funcResults[] = pow($a, $b); } } var_dump($opResults === $funcResults, $opResults, $funcResults);

preferences:
43.4 ms | 402 KiB | 5 Q