How can debugging techniques be applied to identify and fix errors in PHP functions that cause server crashes or hangs?

To identify and fix errors in PHP functions that cause server crashes or hangs, debugging techniques such as using error reporting, logging, and step-by-step code execution can be applied. By enabling error reporting to display all errors, checking log files for any error messages, and using debugging tools like Xdebug, developers can pinpoint the exact location of the error and fix it accordingly.

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

// Log errors to a file
ini_set('log_errors', 1);
ini_set('error_log', '/path/to/error.log');

// Sample PHP function causing server crash
function faultyFunction() {
    // Code causing crash
}

// Call the faulty function
faultyFunction();
?>