How can debugging techniques be effectively utilized to troubleshoot issues with PHP login scripts?

Issue: Troubleshooting issues with PHP login scripts can be effectively done by using debugging techniques such as printing out variables, checking for errors in the code, and using tools like Xdebug to step through the code line by line. PHP Code Snippet: 

<?php
// Start debugging by printing out variables
$username = $_POST['username'];
$password = $_POST['password'];
echo "Username: $username, Password: $password";

// Check for errors in the code
if(empty($username) || empty($password)) {
    echo "Please enter both username and password";
} else {
    // Code for authenticating the user
}

// Use Xdebug to step through the code line by line
// Install Xdebug extension and configure your IDE to use it for debugging
// Set breakpoints in your code and run it in debug mode to step through each line
?>

Keywords

Xdebug var_dump error_reporting PHP error log break points

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