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<?php $a = array(array(1, 2), array(3, 4), array(5)); function get_combinations($arrays) { $result = array(array()); $count = count($arrays); $first_array = $arrays[0]; if($count > 2) { $array_merg = get_combinations(array_slice($arrays, 1)); } else { $array_merg = $arrays[1]; } $tmp = array(); foreach($first_array as $arele1) { //print_r($arele1); foreach($array_merg as $arele2) { print_r($arele2); if(is_array($arele2)) { echo 'asds'; $tmp[] = array_merge(array(arele1),$arele2); } else { $tmp[] = array($arele1,$arele2); } print_r($tmp); } } print_r($tmp); return $tmp; } var_dump(get_combinations($a));
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
5Array ( [0] => Array ( [0] => 3 [1] => 5 ) ) 5Array ( [0] => Array ( [0] => 3 [1] => 5 ) [1] => Array ( [0] => 4 [1] => 5 ) ) Array ( [0] => Array ( [0] => 3 [1] => 5 ) [1] => Array ( [0] => 4 [1] => 5 ) ) Array ( [0] => 3 [1] => 5 ) asds Fatal error: Uncaught Error: Undefined constant "arele1" in /in/TojGu:22 Stack trace: #0 /in/TojGu(33): get_combinations(Array) #1 {main} thrown in /in/TojGu on line 22
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
5Array ( [0] => Array ( [0] => 3 [1] => 5 ) ) 5Array ( [0] => Array ( [0] => 3 [1] => 5 ) [1] => Array ( [0] => 4 [1] => 5 ) ) Array ( [0] => Array ( [0] => 3 [1] => 5 ) [1] => Array ( [0] => 4 [1] => 5 ) ) Array ( [0] => 3 [1] => 5 ) asds Warning: Use of undefined constant arele1 - assumed 'arele1' (this will throw an Error in a future version of PHP) in /in/TojGu on line 22 Array ( [0] => Array ( [0] => arele1 [1] => 3 [2] => 5 ) ) Array ( [0] => 4 [1] => 5 ) asds Warning: Use of undefined constant arele1 - assumed 'arele1' (this will throw an Error in a future version of PHP) in /in/TojGu on line 22 Array ( [0] => Array ( [0] => arele1 [1] => 3 [2] => 5 ) [1] => Array ( [0] => arele1 [1] => 4 [2] => 5 ) ) Array ( [0] => 3 [1] => 5 ) asds Warning: Use of undefined constant arele1 - assumed 'arele1' (this will throw an Error in a future version of PHP) in /in/TojGu on line 22 Array ( [0] => Array ( [0] => arele1 [1] => 3 [2] => 5 ) [1] => Array ( [0] => arele1 [1] => 4 [2] => 5 ) [2] => Array ( [0] => arele1 [1] => 3 [2] => 5 ) ) Array ( [0] => 4 [1] => 5 ) asds Warning: Use of undefined constant arele1 - assumed 'arele1' (this will throw an Error in a future version of PHP) in /in/TojGu on line 22 Array ( [0] => Array ( [0] => arele1 [1] => 3 [2] => 5 ) [1] => Array ( [0] => arele1 [1] => 4 [2] => 5 ) [2] => Array ( [0] => arele1 [1] => 3 [2] => 5 ) [3] => Array ( [0] => arele1 [1] => 4 [2] => 5 ) ) Array ( [0] => Array ( [0] => arele1 [1] => 3 [2] => 5 ) [1] => Array ( [0] => arele1 [1] => 4 [2] => 5 ) [2] => Array ( [0] => arele1 [1] => 3 [2] => 5 ) [3] => Array ( [0] => arele1 [1] => 4 [2] => 5 ) ) array(4) { [0]=> array(3) { [0]=> string(6) "arele1" [1]=> int(3) [2]=> int(5) } [1]=> array(3) { [0]=> string(6) "arele1" [1]=> int(4) [2]=> int(5) } [2]=> array(3) { [0]=> string(6) "arele1" [1]=> int(3) [2]=> int(5) } [3]=> array(3) { [0]=> string(6) "arele1" [1]=> int(4) [2]=> int(5) } }
Output for 4.3.0 - 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, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33
5Array ( [0] => Array ( [0] => 3 [1] => 5 ) ) 5Array ( [0] => Array ( [0] => 3 [1] => 5 ) [1] => Array ( [0] => 4 [1] => 5 ) ) Array ( [0] => Array ( [0] => 3 [1] => 5 ) [1] => Array ( [0] => 4 [1] => 5 ) ) Array ( [0] => 3 [1] => 5 ) asds Notice: Use of undefined constant arele1 - assumed 'arele1' in /in/TojGu on line 22 Array ( [0] => Array ( [0] => arele1 [1] => 3 [2] => 5 ) ) Array ( [0] => 4 [1] => 5 ) asds Notice: Use of undefined constant arele1 - assumed 'arele1' in /in/TojGu on line 22 Array ( [0] => Array ( [0] => arele1 [1] => 3 [2] => 5 ) [1] => Array ( [0] => arele1 [1] => 4 [2] => 5 ) ) Array ( [0] => 3 [1] => 5 ) asds Notice: Use of undefined constant arele1 - assumed 'arele1' in /in/TojGu on line 22 Array ( [0] => Array ( [0] => arele1 [1] => 3 [2] => 5 ) [1] => Array ( [0] => arele1 [1] => 4 [2] => 5 ) [2] => Array ( [0] => arele1 [1] => 3 [2] => 5 ) ) Array ( [0] => 4 [1] => 5 ) asds Notice: Use of undefined constant arele1 - assumed 'arele1' in /in/TojGu on line 22 Array ( [0] => Array ( [0] => arele1 [1] => 3 [2] => 5 ) [1] => Array ( [0] => arele1 [1] => 4 [2] => 5 ) [2] => Array ( [0] => arele1 [1] => 3 [2] => 5 ) [3] => Array ( [0] => arele1 [1] => 4 [2] => 5 ) ) Array ( [0] => Array ( [0] => arele1 [1] => 3 [2] => 5 ) [1] => Array ( [0] => arele1 [1] => 4 [2] => 5 ) [2] => Array ( [0] => arele1 [1] => 3 [2] => 5 ) [3] => Array ( [0] => arele1 [1] => 4 [2] => 5 ) ) array(4) { [0]=> array(3) { [0]=> string(6) "arele1" [1]=> int(3) [2]=> int(5) } [1]=> array(3) { [0]=> string(6) "arele1" [1]=> int(4) [2]=> int(5) } [2]=> array(3) { [0]=> string(6) "arele1" [1]=> int(3) [2]=> int(5) } [3]=> array(3) { [0]=> string(6) "arele1" [1]=> int(4) [2]=> int(5) } }

preferences:
260.96 ms | 412 KiB | 460 Q