找出数组中特定键的位置

Question

I have created a class to find out the position / level of a particular key inside an array. I was actually trying to create a function but I ended up creating an entire class as I had to keep track of my counter. Although the class is working perfectly, I really need to get this done using a function only.

Could you please help me with a solution so that I can achieve the same result using function / functions only.

Here's my code for the class :

class Boom {

private $count = 0; 

    function get_depth($array, $keyValue)
    {   

        foreach ($array as $key=>$value) {

            if($key==$keyValue)
            {   

                return $this->count;


            }
            elseif(is_array($value))
            {
                $this->count++;                 
                echo $this->get_depth($value,$keyValue);
                $this->count--;
            }

        }


    }

}

To use this class:

$obj = new Boom();  
echo $obj->get_depth($array, 'your_key'); // 'your_key' example: 'Refrigerator'

You can use an array like following:

$asset = array(

'Electronics' => array(
                "TV"=>array("TV1"=>500,"TV2"=>2500),
                "Refrigerator"=>200,
                "Washing Machine"=>array("WM1"=>array("b1"=>array("b11"=>80,"b22"=>10),"WM12"=>10),"WM2"=>5500),
                "Savings Accounts"=>200,
                "Money Market Accounts"=>200,
                 ),
'Sports'=> array(
                "Cricket"=>array("CBat"=>500,"CBall"=>2500),
                "Tennis"=>900,
                "Football"=>array("FBall"=>1500,"FJersy"=>5500),

                ),
'Random' =>"0"                                  
);

Answer 1

Simple. Just pass in the key on each recursive call:

function get_depth($array, $keyValue, $count = 0)
{
    foreach ($array as $key=>$value) {
        if ($key==$keyValue) {
            return $count;
        } elseif (is_array($value)) {
            $count++;                 
            echo get_depth($value, $keyValue, $count);
            $count--;
        }
    }
}

Note: I haven't verified the functionality of your code, I just copied your exact code in a way that does not require a class to store the variable.

Another way to do it might be to use a static variable (also not tested), but I would suggest going with the first method, above:

function get_depth($array, $keyValue)
{
    static $count = 0;

    foreach ($array as $key=>$value) {
        if ($key==$keyValue) {
            return $count;
        } elseif (is_array($value)) {
            $count++;
            echo get_depth($value, $keyValue);
            $count--;
        }
    }
}