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run code in 150+ php & hhvm versions
Bugs & Features
<?php $array1 = array(1,2,2,2,2,3,4,5,6,7); $array2 = array(3,4,2,2,2,7,8,9,10); foreach($array1 as $value) { if (in_array($value,$array2) && !in_array($value,$output["greens"])) { $output["greens"][]=$value; } else { $output["reds"][]=$value; } } print_r($output);
Output for 5.3.0 - 5.6.28, 7.0.0 - 7.1.0
Notice: Undefined index: greens in /in/9BO7N on line 7 Warning: in_array() expects parameter 2 to be array, null given in /in/9BO7N on line 7 Array ( [reds] => Array ( [0] => 1 [1] => 2 [2] => 2 [3] => 2 [4] => 5 [5] => 6 ) [greens] => Array ( [0] => 2 [1] => 3 [2] => 4 [3] => 7 ) )
Output for hhvm-3.10.0 - 3.12.0
Notice: Undefined index: greens in /in/9BO7N on line 7 Warning: in_array() expects parameter 2 to be an array or collection in /in/9BO7N on line 7 Array ( [reds] => Array ( [0] => 1 [1] => 2 [2] => 2 [3] => 2 [4] => 5 [5] => 6 ) [greens] => Array ( [0] => 2 [1] => 3 [2] => 4 [3] => 7 ) )
Output for 4.3.2 - 5.2.17
Notice: Undefined index: greens in /in/9BO7N on line 7 Warning: in_array(): Wrong datatype for second argument in /in/9BO7N on line 7 Array ( [reds] => Array ( [0] => 1 [1] => 2 [2] => 2 [3] => 2 [4] => 5 [5] => 6 ) [greens] => Array ( [0] => 2 [1] => 3 [2] => 4 [3] => 7 ) )
Output for 4.3.0 - 4.3.1
Notice: Undefined index: greens in /in/9BO7N on line 7 Warning: in_array() [http://www.php.net/function.in-array]: Wrong datatype for second argument in /in/9BO7N on line 7 Array ( [reds] => Array ( [0] => 1 [1] => 2 [2] => 2 [3] => 2 [4] => 5 [5] => 6 ) [greens] => Array ( [0] => 2 [1] => 3 [2] => 4 [3] => 7 ) )