Basic PHP error logging

index.php

<?php
// Configure error levels
error_reporting(E_ERROR);
ini_set('display_errors', 1);

// Path to err log
$errorLogs = "/var/www/logs/error.log";

// Obtain IP of remote client
$requestIP = $_SERVER['REMOTE_ADDR'];

// Create error message
$logError = sprintf("\n\n%s - 'function_name' Error (%s) \nerror_string", time(), $requestIP);

// Log error to file
error_log($logError, 3, $errorLogs);
?>