What are the different ways to retrieve post variables in PHP?

To retrieve post variables in PHP, you can use the $_POST superglobal array. This array contains key-value pairs of data sent to the server using the HTTP POST method. You can access specific post variables by using their corresponding keys as indices in the $_POST array. 

// Retrieve a specific post variable
$variable = $_POST['key'];

// Check if a post variable exists before accessing it
if(isset($_POST['key'])){
    $variable = $_POST['key'];
}

Keywords

$_POST $_GET $_REQUEST filter_input filter_var

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