How can PHP developers effectively debug and troubleshoot code when encountering errors or unexpected behavior?

To effectively debug and troubleshoot PHP code, developers can use tools like Xdebug for step-by-step debugging, logging functions like error_log() or var_dump() to track variables and outputs, and enabling error reporting to display errors. By systematically checking code logic, examining error messages, and isolating problematic code segments, developers can identify and resolve issues efficiently.

// Enable error reporting
error_reporting(E_ALL);
ini_set('display_errors', 1);

// Use error_log() to log errors
error_log("An error occurred: " . $error_message);

// Utilize var_dump() to inspect variables
var_dump($variable_to_inspect);

// Implement Xdebug for step-by-step debugging
xdebug_start_trace();
// Code segment to debug
xdebug_stop_trace();