Use foreach()
对于第一个数组并检查第一个数组的键是否存在于第二个数组中。如果存在则计算总和。例子:
$arr1 = Array
(
"Jan 01, 2013" => Array
(
"COM" => 100,
"RES" => 200,
),
"Oct 28, 2014" => Array
(
"COM" => 300,
"RES" => 400,
)
);
$arr2 = Array
(
"Jan 01, 2013" => Array
(
"COM" => 10,
"RES" => 20,
),
"Oct 28, 2014" => Array
(
"COM" => 30,
"RES" => 40,
)
);
$arr3 = array();
foreach($arr1 as $key => $val):
if(array_key_exists($key, $arr2)):
$arr3[$key]["COM"] = $val["COM"] + $arr2[$key]["COM"];
$arr3[$key]["RES"] = $val["RES"] + $arr2[$key]["RES"];
endif;
endforeach;
print '<pre>';
print_r($arr3);
print '</pre>';
Output:
Array
(
[Jan 01, 2013] => Array
(
[COM] => 110
[RES] => 220
)
[Oct 28, 2014] => Array
(
[COM] => 330
[RES] => 440
)
)