<?php $strings = [ "1,2,3,4", "1,2,3", "1,2" ]; $minElements = 3; $defaultVal = null; foreach ($strings as $string) { [$a, $b, $c] = array_pad(explode(',', $string, $minElements), $minElements, $defaultVal); var_export($a); echo ' _ '; var_export($b); echo ' _ '; var_export($c); echo "\n-----------------\n"; }
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