sleepy-responses.php

<?php
/**
 * Plugin Name: Sleepy Responses
 * Plugin URI: https://gist.github.com/westonruter/b66cfc51397c75d6497b6ed0aeb68ce3
 * Description: Slows down a response when a <code>sleep</code> query parameter is provided, with a value being an integer for the number of seconds passed into the PHP <code>sleep()</code> function. Only applies when <code>WP_DEBUG</code> is enabled or when <code>wp_get_environment_type()</code> returns <code>local</code> or <code>development</code>.
 * Requires at least: 6.8
 * Requires PHP: 7.4
 * Version: 0.1.0
 * Author: Weston Ruter
 * Author URI: https://weston.ruter.net/
 * License: GPLv2 or later
 * License URI: https://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * Update URI: https://gist.github.com/westonruter/b66cfc51397c75d6497b6ed0aeb68ce3
 * Gist Plugin URI: https://gist.github.com/westonruter/b66cfc51397c75d6497b6ed0aeb68ce3
 * Primary Branch: main
 *
 * @package SleepyResponses
 */

if ( isset( $_GET['sleep'] ) ) {
	if ( ! ( WP_DEBUG || in_array( wp_get_environment_type(), array( 'local', 'development' ) ) ) ) {
		wp_die( 'Unable to sleep when not using in debug mode or not in a local/development environment.', 'I cannot sleep!', array( 'response' => 400 ) );
	}
	if ( ! rest_is_integer( $_GET['sleep'] ) ) {
		wp_die( 'Sleep duration must be an integer.', 'Sleep disorder!', array( 'response' => 400 ) );
	}
	$sleep = (int) $_GET['sleep'];
	if ( $sleep <= 0 ) {
		wp_die( 'Sleep duration must be a positive integer above zero.', 'Time traveler?!', array( 'response' => 400 ) );
	}
	sleep( $sleep );
}