How can debugging techniques be improved to identify and resolve errors in PHP code effectively?

To improve debugging techniques in PHP, developers can utilize tools like Xdebug, which provides features like stack traces, profiling, and code coverage analysis. Additionally, using error reporting functions like error_log() or trigger_error() can help pinpoint issues in the code. Finally, incorporating logging mechanisms and unit testing can aid in identifying and resolving errors effectively.

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

// Use error_log() to log errors to a file
error_log("An error has occurred");

// Implement unit testing to catch errors early
// Example using PHPUnit
class MyTest extends PHPUnit_Framework_TestCase {
    public function testSomething() {
        $this->assertTrue(true);
    }
}