<?php function f($a) { foreach ($a as $i) { foreach ($a as $j) { var_export($i); echo ' , '; var_eport($j); echo ' --> '; var_export(min($i, $j)); echo ' / '; var_export(min($j, $i)); echo "\n"; } } } $a = [0, null, false, 42, -37];
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