<?php function permutation(array $arr) { $out = array(); while($ele=array_shift($arr)) { $x=$ele; //echo $x."\n"; foreach($arr as $rest) { $x.=" $rest"; //echo $x."\n"; array_push($out, $x); } } foreach($out as $o) { echo $o; } } permutation(array("Rafting","Hiking","Running","Biking"));
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