二维数组相同键里的值相加

<?php
header("Content-type: text/html; charset=utf-8");

$_data1=Array
(
"0" => Array
(
"userid" => 1,
"username" => 'admin',
"roleid" => '超级管理员',
"has_number" => 23,
"no_number" => 0,
"all_number" => 92
),

"1" => Array
(
"userid" => 5,
"username" => 'office',
"roleid" => '总编',
"has_number" => 56,
"no_number" => 0,
"all_number" => 56
),

"2" => Array
(
"userid" => 6,
"username" => 'nyfzjt001',
"roleid" => '编辑',
"has_number" => 65,
"no_number" => 6,
"all_number" => 112
)

);
$_data2=Array
(
"0" => Array
(
"userid" => 1,
"username" => 'admin',
"roleid" => '超级管理员',
"has_number" => 23,
"no_number" => 0,
"all_number" => 92
),

"1" => Array
(
"userid" => 5,
"username" => 'office',
"roleid" => '总编',
"has_number" => 56,
"no_number" => 0,
"all_number" => 56
),

"2" => Array
(
"userid" => 6,
"username" => 'nyfzjt001',
"roleid" => '编辑',
"has_number" => 65,
"no_number" => 6,
"all_number" => 112
)

);

//两数组值相加
$data=array();
function array_add($arr1,$arr2)
{
foreach ($arr1 as $k1 => $v1)
{
foreach ($arr2 as $k2 => $v2)
{
if($k1==$k2)
{
$data[$k1]['userid']=$v1['userid'];
$data[$k1]['username']=$v1['username'];
$data[$k1]['roleid']=$v1['roleid'];
$data[$k1]['has_number']=$v2['has_number']+$v1['has_number'];
$data[$k1]['no_number']=$v2['no_number']+$v1['no_number'];
$data[$k1]['all_number']=$v2['all_number']+$v1['all_number'];
}
}

}

return $data;

}

print_r(array_add($_data1,$_data2));

?>