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<?php function getCombinedSum($digits, $sum) { if(!is_int($digits) || !is_int($sum) || $digits<1 || $sum<0) { throw new InvalidArgumentException('Invalid numeric format'); } if($sum>9*$digits) { throw new LogicException('Sum out of range'); } if($digits==1) { return $sum; } $result = []; for($digit=0; $digit<10; $digit++) { if($sum-$digit>0) { $result[] = $digit.getCombinedSum($digits-1, $sum-$digit); } else { break; } } return $result; } var_dump(getCombinedSum(3, 4));
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: Array to string conversion in /in/P7KgU on line 22 Warning: Array to string conversion in /in/P7KgU on line 22 Warning: Array to string conversion in /in/P7KgU on line 22 Warning: Array to string conversion in /in/P7KgU on line 22 array(4) { [0]=> string(6) "0Array" [1]=> string(6) "1Array" [2]=> string(6) "2Array" [3]=> string(6) "3Array" }
Output for 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 - 7.1.20, 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: Array to string conversion in /in/P7KgU on line 22 Notice: Array to string conversion in /in/P7KgU on line 22 Notice: Array to string conversion in /in/P7KgU on line 22 Notice: Array to string conversion in /in/P7KgU on line 22 array(4) { [0]=> string(6) "0Array" [1]=> string(6) "1Array" [2]=> string(6) "2Array" [3]=> string(6) "3Array" }
Output for 7.3.32 - 7.3.33, 7.4.26
array(4) { [0]=> string(6) "0Array" [1]=> string(6) "1Array" [2]=> string(6) "2Array" [3]=> string(6) "3Array" }
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/P7KgU on line 17
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/P7KgU on line 17
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_NEW in /in/P7KgU on line 7
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_NEW in /in/P7KgU on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/P7KgU on line 7
Process exited with code 255.
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