Receiving URL Query Parameters in PHP

A memo about how to receive URL query parameters in PHP. Uses the isset function and $_GET variable.

An example that returns “1” when &black=true is defined

<?php
if (isset($_GET['black'])) {
    // echo $_GET['black'];
        if ($_GET['black'] == "true") {
            echo "1" ;
        }
} else {
    // Fallback behaviour goes here
}

?>