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run code in 150+ php & hhvm versions
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<?php function position_merge(array $arr1,array $arr2) { function addIndex(&$item,$idx) { $item["array_index"]=$idx; } function rmIndex(&$item) { unset($item["array_index"]); } array_walk($arr1,"addIndex"); array_walk($arr2,"addIndex"); $result=array_merge($arr1,$arr2); usort($result,function($a,$b){ return $a["position"]>$b["position"]?1:($a["position"]<$b["position"]?-1:$a["array_index"]-$b["array_index"]); }); array_walk($result,"rmIndex"); return $result; } $array1 = array( array('name' => 'Bob', 'position' => 1), array('name' => 'Tim', 'position' => 1), array('name' => 'Alf', 'position' => 3), array('name' => 'Jon', 'position' => 3) ); $array2 = array( array('name' => 'Tom', 'position' => 2), array('name' => 'Joe', 'position' => 2), array('name' => 'Jim', 'position' => 2), array('name' => 'Kev', 'position' => 2) ); print_r(position_merge($array1,$array2));
Output for 5.3.0 - 7.1.0
Array ( [0] => Array ( [name] => Bob [position] => 1 ) [1] => Array ( [name] => Tim [position] => 1 ) [2] => Array ( [name] => Tom [position] => 2 ) [3] => Array ( [name] => Joe [position] => 2 ) [4] => Array ( [name] => Jim [position] => 2 ) [5] => Array ( [name] => Kev [position] => 2 ) [6] => Array ( [name] => Alf [position] => 3 ) [7] => Array ( [name] => Jon [position] => 3 ) )
Output for 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/qTSiL on line 15
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY, expecting '&' or T_VARIABLE in /in/qTSiL 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/qTSiL 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/qTSiL on line 2
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/qTSiL on line 2
Process exited with code 255.