What are some common debugging techniques to troubleshoot PHP scripts that involve form submissions?

One common issue when troubleshooting PHP scripts that involve form submissions is that the form data is not being properly processed or stored. To solve this, you can use the $_POST superglobal array to access the form data submitted by the user and then validate and sanitize the input before processing it further. 

if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $username = $_POST["username"];
    $email = $_POST["email"];
    
    // Validate and sanitize input
    $username = filter_var($username, FILTER_SANITIZE_STRING);
    $email = filter_var($email, FILTER_SANITIZE_EMAIL);
    
    // Process the form data further
    // Your code here
}

Keywords

Xdebug var_dump error_reporting $_POST PHPStorm

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