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<?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($output);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: Undefined array key "greens" in /in/9BO7N on line 7 Fatal error: Uncaught TypeError: in_array(): Argument #2 ($haystack) must be of type array, null given in /in/9BO7N:7 Stack trace: #0 /in/9BO7N(7): in_array(2, NULL) #1 {main} thrown in /in/9BO7N on line 7
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33
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 7.3.32 - 7.3.33, 7.4.26
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 4.3.2 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 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 ) )

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