finding the first element that is needed

I have this array

Array
(
    [name] => Step1 is here
    [standard] => Array
        (
            [product_id] => 85,99
            [product_name] => Step1 is here
            [product_price] => 976.0000
            [product_description] => :something 
            [product_image] => http://someurl.com/shop_pos/image/data/13D.png
        )

    [professional] => Array
        (
            [product_id] => 61
            [product_name] => Step1 is here
            [product_price] => 289.0000
            [product_description] => somethingothere 
            [product_image] => http://someurl.com/shop_pos/image/data/13B.png
        )
    [premium] => Array
        (
            [product_id] => 677
            [product_name] => Step1 is here
            [product_price] => 289.0000
            [product_description] => somethingothere 
            [product_image] => http://someurl.com/shop_pos/image/data/13A.png
        )

)

Is there an easy of referencing in the proper order that i need. SO the order i need is standard, professional, premium.. so if one is not present can I do to the other like this

 if (!isset($my_array['standard'])) {
 $use_me = $my_array['standard']
}elseif(!isset($my_array['professional'])) {
 $use_me = $my_array开发者_如何学C['professional']
}elseif(!isset($my_array['professional'])) {
    $use_me = $my_array['premium']}
}

i have the above code that i think may work but is there a better way

That should do it:

$keys = array_slice(array_keys($my_array), 1, 1);
$use_me = $my_array[$keys[0]];

In short:

1. Get the array keys (name, standard, professional, premium). (array_keys)
2. Get the second key (bypassing name, so it returns standard or whatever the second key is). (array_slice)
3. Reference $my_array using that key and store it in $use_me.

I would do this:

foreach (array('standard', 'professional', 'premium') as $name) {
    if (isset($my_array[$name])) {
        $use_me = $my_array[$name];
        break;
    }
}

or a little more structured:

function selectPlan($array) {
    foreach (array('standard', 'professional', 'premium') as $name) {
        if (isset($array[$name])) return $array[$name];
    }
}

$use_me = selectPlan($my_array);

Yes, you can do it the way you have presented in your code. However, your if statement logic is not correct. Your code should be like this:

if (isset($my_array['standard'])) {
    $use_me = $my_array['standard'];
} elseif(isset($my_array['professional'])) {
    $use_me = $my_array['professional'];
} elseif(isset($my_array['premium'])) {
    $use_me = $my_array['premium'];
}

try with array_key_exists

foreach($input as $k=>$v) {

if (array_key_exists('standard', $k)) {
$output [$k] = $k;
}
if (array_key_exists('professional', $k)) {
$output [$k] = $k;
}
if (array_key_exists('premium', $k)) {
$output [$k] = $k;
} 

}

or u can go through array-intersect-key

If I understand correctly what you want to do, and if the order of the keys is not guaranteed to be exactly like the one in the example, you can do something like:

// initialization
$use_me = 'default value';

// go through each package
foreach (array('standard', 'professional', 'premium') as $package) {
    // when we find a package that does exist
    if (isset($my_array[$package])) {
        // mark it as found and exit the loop
        $use_me = $package;
        break;
    }
}

This will go through all the packages and set the $use_me variable to the first found value. If no value is found, it sets it to a default value.