在键值数组中，如何在foreach循环中增加数组值 - in a key value array, how to increment array value in foreach loop

in a key value array, how to increment array value in foreach loop

我有一个数组

        $rel = array('grandfather' => 0 ,
                    'grandmother' => 0 ,
                    'father' => 0 ,
                    'sister' => 0 ,
            );

我想把它与的数组$family进行比较

    $data['family'] = $facebook->api('/me/family?fields=name,relationship,education,location,cover');

使用foreach循环

     foreach ($family as $families) {
            foreach ($families as $fams) {
                $id = $fams['id'];  
                $name = $fams['name'];
                $relationship = $fams['relationship'];
                foreach($rel as $k => $val){
                    if($k == $relationship)
                    {
                        $val += 1;
                    }
                }
            }
        }

我希望$val在每次迭代中递增，这样如果我有5个姐妹。。我什么时候

print_r($rel);

结果将是

Array ( [grandfather] => 0 [grandmother] => 0 [father] => 0 [sister] => 5 )

我已经尝试了上面的代码，但它仍然返回到0.

尝试这个

if($k == $relationship)
{
   $rel[$k] += 1;
}

它应该可以工作。

foreach（$familyas$familys）｛

        foreach ($families as $fams) {
            $id = $fams['id'];  
            $name = $fams['name'];
            $relationship = $fams['relationship'];
            foreach($rel as $k => $val){
                if($k == $relationship)
                {
                    $rel[$relationship]++;
                }
            }
        }
    }