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run code in 200+ php & hhvm versions
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<?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"));
based on i9XjG
Output for 5.1.0 - 7.2.0
Rafting HikingRafting Hiking RunningRafting Hiking Running BikingHiking RunningHiking Running BikingRunning Biking
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/QGeKc on line 2
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_ARRAY, expecting ')' in /in/QGeKc on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_ARRAY, expecting ')' in /in/QGeKc on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/QGeKc on line 2
Process exited with code 255.