Question

Need some explanation.
I made form as following:

<form action="test4.php" method="post">
    <select name="code">
        <option value="A">A</option>
        <option value="B">B</option>
        <option value="C">C</option>
        <option value="D">D</option>
        <option value="E">E</option>
    </select>
    <input type="submit" value="Cus!">
</form>

Then to store value of the form to $code, I used a line of script that I found in a forum

$code= empty ($_POST['code']) ? null : $_POST['code'];

Actually It worked, But it was not explained.
Anybody can explain it to me??

Answer 1

It’s ternary. The syntax is var = (true) ? trueValue : falseValue; It’s the same as this:

if  ( empty($_POST['code']) ) {
    $code =  null;
} else {
    $code = $_POST['code'];
}