Detect which condition is false in multiple if statement

I try to shorten my code, and so I come along to shorten the following type of if statement:

// a,b,c,d needed to run
if ( empty(a) ) {
    echo 'a is empty';
} elseif ( empty(b) ) {
    echo 'b is empty';
} elseif ( empty(c) ) {
    echo 'c is empty';
} elseif ( empty(d) ) {
    echo 'd is empty';
} else {
  // run code with a,b,c,d
}

Is there a way to detect which one of the conditions was false (is emtpy)?

if ( empty(a) || empty(b) || empty (c) || empty(d) ) {
     echo *statement n*.' is empty';
} else {
  // run code with a,b,c,d
}

I tought about a for loop, but that would need massive code changes. Maybe someone can point me to the right direction.

Thanks in advance :)

Jens