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January 31, 2018 21:47
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Function to sum two arrays in php
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| <?php | |
| /** | |
| * Function to sum two arrays | |
| * | |
| * @param array $a First array to merge | |
| * @param array $b Second array to merge which gonna be returned by function | |
| * | |
| * @author Orlando Villegas Galán <orvigas@gmail.com> | |
| * @return $b | |
| */ | |
| function sumArrays(array $a = [], array $b = []) { | |
| foreach ($a as $k => $v) {//Iterate along the '$a' array, getting key value pair for every array position | |
| if(array_key_exists($k, $b)){//Check if '$a' key exist in '$b' | |
| //If key exist into '$b' array | |
| if(is_array($v)){//Check if value of key is an array | |
| //If value is an array | |
| $b[$k] = sumArrays($b[$k],$v);//The function is called itself recursively | |
| }else{ | |
| //Otherwise | |
| $b[$k]+=$v;//Accumulates the '$a' value in '$b' key position | |
| } | |
| }else{ | |
| //Otherwise | |
| $b[$k]=$v; //Create key node in '$b' | |
| } | |
| } | |
| //Return merged '$b' | |
| return $b; | |
| } | |
| /** Array declaration **/ | |
| $a = [4,"a" => 3, "b" => ["ba" => 1, "bc" => 2], "c" => ["ca" => 4, "cb" => 3]]; | |
| $b = [5,"a" => 2, "b" => ["ba" => 4, "bc" => 3], "c" => ["ca" => 4]]; | |
| print_r(sumArrays($a, $b)); | |
| /** Output **/ | |
| /* | |
| Array | |
| ( | |
| [0] => 9 | |
| [a] => 5 | |
| [b] => Array | |
| ( | |
| [ba] => 5 | |
| [bc] => 5 | |
| ) | |
| [c] => Array | |
| ( | |
| [ca] => 8 | |
| [cb] => 3 | |
| ) | |
| ) | |
| */ | |
| ?> |
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