What is the difference between using $_GET and $_POST to retrieve URL parameters in PHP?

When retrieving URL parameters in PHP, the main difference between using $_GET and $_POST is the method by which the parameters are passed. $_GET retrieves parameters from the URL itself, while $_POST retrieves parameters from a form submission. If you are passing parameters through the URL, use $_GET. If you are passing parameters through a form submission, use $_POST. 

// Using $_GET to retrieve URL parameters
$parameter = $_GET['parameter_name'];

// Using $_POST to retrieve form parameters
$parameter = $_POST['parameter_name'];

Keywords

$_GET $_POST URL parameters PHP difference

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