Compounding array only if a certain key exists in array element

Question

In laravel, I have a working code block where I loop an array and within it I call an email list. However, there are certain elements in the array that have a specific email that I want to add to it. So I always want the existing email config list to be used no matter what, but if the array element of the person has an email key I want to add that to the emails array, if that makes sense.

Here is the existing code as it:

    $items = array(
        array(
            "employee" => 123,
            "name" => "Tom",
            "email" => "[email protected]"
        ),
        array(
            "employee" => 234,
            "name" => "Sally"
        ),
        array(
            "employee" => 345,
            "name" => "Rob"
        ),
        array(
            "employee" => 456,
            "name" => "Ed"
            "email" => "[email protected]"
        ),
        array(
            "employee" => 567,
            "name" => "Barbara"
        )
    );

    foreach($items as $item){

        //if there is an override email in the command
        if($this->option('email') != 'default') {
           
            if(!filter_var($this->option('email'), FILTER_VALIDATE_EMAIL)) {
                $this->error('invalid email:'.$this->option('email'));
                return;
            }
        
            $emails = ['to'=>[$this->option('email')],'cc'=>[]];
        
        } else {

            //This line works as is but I want a condition so that if the array element has and "email" key, I add that value as well
            $emails = config('emails.printouts.employeePrintOuts');

            //here I would need to add the array value (if email is set in that element)

        }


        ...

    }

The part in question is only in the 'else' block. How can I properly do this so that only certain array elements will have an email key and if they do I add it to the emails array that is always using the config list?

So if I use that, I could add that email into the array, but then if run the existing line for the config will it add to the array or just replace it? — Geoff_S
– Geoff_S, Commented Aug 10, 2020 at 18:32
You can use that to check if a key exists in an array, you'll have to write the logic yourself — GrumpyCrouton
– GrumpyCrouton, Commented Aug 10, 2020 at 18:35
If you want to not overwrite, but just add email, then you also can check email existing in array with in_array() function. Try this: ` if (array_key_exist('email',$item)){ if (!in_array($item['email],$emails['to'])){ $emails['to'][] = $item['email']; } } ` — krylov123
– krylov123, Commented Aug 10, 2020 at 18:40

krylov123 · Accepted Answer · 2020-08-10 19:17:19Z

1

As mentioned in comments, you can use array_key_exist() function to check that $items contain email key.

Also to fullfil $emails['to'] subarray only in case that it doesn't contain current $items['email'] you may use in_array() function.

Solution:

if ( array_key_exist('email', $item) && !in_array($item['email'], $emails['to']) )
{
    //TODO validate $item['email'] here
    $emails['to'][] = $item['email'];
}

//Result $emails array will be looks like this:
[
 'to' => [ "[email protected]", "[email protected]" ],
 'cc' => []
]

answered Aug 10, 2020 at 19:17

krylov123

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