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run code in 200+ php & hhvm versions
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<?php function decartProductPair($one, $two) { $result=[]; for($i=0; $i<count($one); $i++) { for($j=0; $j<count($two); $j++) { $result[]=array_merge((array)$one[$i], (array)$two[$j]); } } return array_values($result); } function decartProduct() { $args = func_get_args(); if(!count($args)) { return []; } $result = array_shift($args); while($arg=array_shift($args)) { $result=decartProductPair($result, $arg); } return $result; } $data = array( 2 => array( 0 => 'Body', 1 => 'Face' ), 5 => array( 0 => '*', 1 => '**', 2 => '***' ), 7 => array( 0 => 'Europe', 1 => 'Asia' ) ); $result = array_map(function($set) { return join(',', $set); }, call_user_func_array('decartProduct', array_values($data))); var_dump($result);
Output for 5.4.0 - 7.2.0
array(12) { [0]=> string(13) "Body,*,Europe" [1]=> string(11) "Body,*,Asia" [2]=> string(14) "Body,**,Europe" [3]=> string(12) "Body,**,Asia" [4]=> string(15) "Body,***,Europe" [5]=> string(13) "Body,***,Asia" [6]=> string(13) "Face,*,Europe" [7]=> string(11) "Face,*,Asia" [8]=> string(14) "Face,**,Europe" [9]=> string(12) "Face,**,Asia" [10]=> string(15) "Face,***,Europe" [11]=> string(13) "Face,***,Asia" }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/32TmP on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/32TmP on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/32TmP on line 5
Process exited with code 255.