I have two arrays.
$a = array('a' => 2, 'b' => 5, 'c' => 8);
$b = array('a' => 3, 'b' => 7, 'c' => 10);
I want to merge these two arrays and get following result.
$c = array('a' => 5, 'b' => 12, 'c' => 18);
What is the easiest way to archive this?
Thanks!
As mentioned in the comments, looping through the array will do the trick.
$a = array('a' => 2, 'b' => 5, 'c' => 8);
$b = array('a' => 3, 'b' => 7, 'c' => 10);
$c = array();
foreach($a as $index => $item) {
if(isset($b[$index])) {
$new_value = $a[$index] + $b[$index];
$c[$index] = $new_value;
}
}
isset to solve this. This will merely ignore any other keys that are in $a but not in $b. This could get more complex by adding the new key to $c, however this doesn't fit the scenario of the question so I didn't add it.$c = array();
foreach ($a as $k => $v) {
if (isset($b[$k])) {
$c[$k] = $b[$k] + $v;
}
}
You need to check whether keys exist in both arrays.
You can simply use foreach as
foreach($b as $key => $value){
if(in_array($key,array_keys($a)))
$result[$key] = $a[$key]+$value;
}
You can easily do this by foreach loop, please see the example below
$c = array();
$a = array('a' => 2, 'b' => 5, 'c' => 8);
$b = array('a' => 3, 'b' => 7, 'c' => 10);
foreach ($a as $key => $value) {
$tmp_value = $a[$key] + $b[$key];
$c[$key] = $tmp_value;
}
print_r($c);
