PHP: a short cut for isset and !empty?

Question

I wonder if there any better ideas to solve the problem below,

I have a form with a number of input fields, such as,

Answer 1

You can create a small function that can do this job for you simply.

function sc_post_isset(...$args) {
    $exists = true;

    foreach($args as $arg) {
        if ( !isset($_POST[$arg])  || empty($_POST[$arg]) ) {
            $exists = false;
        }
    }

    return $exists;
}

Use,

if(sc_post_isset('key')) {
     // it exists.
}

OR

if(sc_post_isset('key1', 'key2', 'key3')) {
     // it exists.
}

It just simply check if all the provided keys exist within $_POST and not empty