使用第一个数组作为键组合两个数组（但有重复项），然后添加具有匹配重复项的第二个数组值

Question

I want to combine two arrays. First use the first array as the key(combining the duplicates) then add the values from the second array to adjust to the specific keys

//first array  
array('1','0','1'); 
//second array 
array('50','10','20');

//output -> first array ('1','0') second array -> ('70','10')

removing the duplicates in the first array and adding the corresponding "duplicate" key in the second array values

Answer 1

Use a result array to collect the outcomes like this:

//first array  
$k = array('1','0','1'); 
//second array 
$v = array('50','10','20');

$result = array();

foreach($k as $index => $value) {
    if(!isset($result[$value])) {
        $result[$value] = 0;
    }
    $result[$value] += $v[$index];
}

print_r($result);