Log errors in WordPress

wordpress-debug-logger.php

<?php
/**
 * Log any errors for debugging.
 *
 * @global WP_DEBUG
 * @uses error_log
 * @var string|array $message the error message (a string or array)
 */
if( !function_exists( 'jdn_log_me' ) ) {
	function jdn_log_me( $message ) {
		if ( WP_DEBUG === true ) {
			if ( is_array( $message ) || is_object( $message ) ) {
				error_log( 'Custom Plugin Error: ' . print_r( $message, true ) );
			} else {
				error_log( 'Custom Plugin Error: ' . $message );
			}
		}
	}
}