This guide will show you how to fix Cloudflare's Error 524 (A timeout occurred)
A 524 error states that Cloudflare was able to make a TCP connection to the origin, but the origin did not reply with a HTTP response before the connection timed out.
Cloudflare will typically wait for a HTTP response from your server for 100 seconds. If no response(<8KB) is sent by your server in that time, Cloudflare will close the connection and serve a 524 error page.
This error is commonly caused by a long-running process on the origin server, such as a PHP application or a database query which the web server must wait on before responding to a request.
To fix this, you need to send a >8KB data earlier than your "long-running process".
see PHP CODE
see PHP CODE FIX 1 PHP CODE FIX 2
Author: Marcial Paul G. im.codename@gmail.com
Option #1: Turn off any compression that may minify the response of the file (gzip/deflate/br in apache/nginx)
Option #2: increment $spacer_size variable by 1 until it works