How can I determine which variable names were passed to me from a form in PHP?

To determine which variable names were passed to you from a form in PHP, you can use the `$_POST` or `$_GET` superglobal arrays. These arrays contain key-value pairs of all the form data that was submitted. You can loop through these arrays to access the variable names that were passed to you. 

// Loop through the $_POST array to get the variable names passed from the form
foreach ($_POST as $key => $value) {
    echo "Variable name: " . $key . "<br>";
}

// Loop through the $_GET array to get the variable names passed from the form
foreach ($_GET as $key => $value) {
    echo "Variable name: " . $key . "<br>";
}

Keywords

PHP form variable names $_POST $_GET

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