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phpisset

How to combine isset with is_array

I am using is_array function but need to use isset as well, as if nothing is selected I am get a undefined index error.

I am still learning PHP so not sure how to combine what I have written with isset, my code is below 

$special = $_POST['special'];
if (is_array($_POST['special'])) {
    $special = implode(",", $_POST['special']);
} else {
    $special = $_POST['special'];
}

Many Thanks

Solution

  • You are attempting to assign the value of $_POST['special'] to $special whether it is set or not. That is why you are getting an error. The following might work:

    $special = ""; 
if (isset($_POST['special'])) {
    if(is_array($_POST['special'])) {
        $special = implode(",", $_POST['special']);
    } else {
        $special = $_POST['special'];
    }
}

    If $_POST['special'] is an array it will use implode to convert it to a string and assign it to $special.

    If it is not an array, but is still set, then assign the value to $special