Tests on shorthand ternary operator in PHP

teste.php

<?php
function first()
{
    echo "#1\n";
    return false;
}

function second()
{
    echo "#2\n";
    return false;
}

function third()
{
    echo "#3\n";
    return false;
}

function forth()
{
    echo "#4\n";
    return false;
}

first() ?: second() ?: third() ?: forth();

// $ php teste.php 
// #1
// #2
// #3
// #4