Please install the health check plugin and report back its findings: https://wordpress.org/plugins/health-check/
The troubleshooting page will let you see if a plugin is responsible for the loopback problem.
@ Steve Stern….
I activated Health Check Plugin, Here are my findings
### WordPress ###
Version: 4.9.4
Language: en_US
Permalink structure: /%category%/%postname%/
Is this site using HTTPS?: No
Can anyone register on this site?: No
Default comment status: open
Is this a multisite?: Yes
User Count: 1
Site Count: 6
Network Count: 1
Communication with WordPress.org: WordPress.org is reachable
Create loopback requests: The loopback request to your site completed successfully.
### Active theme ###
Name: Mandar Apte RWD
Version: 11.1
Author: Mandar Apte
Author website: http://mandarapte.com/
Parent theme: Not a child theme
Supported theme features: automatic-feed-links, post-thumbnails, menus, post-formats, custom-background, html5, custom-header, infinite-scroll, widgets
### Other themes (6) ###
Mandar Apte - Apps RWD (mandar-apte-apps-rwd-11-1): Version 11.1 by Mandar Apte
Mandar Apte - Design Case Study RWD (mandar-apte-design-case-study-rwd-11-1): Version 11.1 by Mandar Apte
Mandar Apte - Design Resource RWD (mandar-apte-design-resource-rwd-11-1): Version 11.1 by Mandar Apte
Mandar Apte - Developer Resource RWD (mandar-apte-developer-resource-rwd-11-1): Version 11.1 by Mandar Apte
Mandar Apte - Inspirations RWD (mandar-apte-inspirations-rwd-11-1): Version 11.1 by Mandar Apte
Twenty Fifteen (twentyfifteen): Version 1.9 by the WordPress team
### Must Use Plugins (1) ###
Health Check Disable Plugins: Version 1.3
### Active Plugins (9) ###
Akismet Anti-Spam: Version 4.0.3 by Automattic
Block Bad Queries (BBQ): Version 20171101 by Jeff Starr
Download Monitor: Version 4.0.5 by Never5
FD Feedburner Plugin: Version 1.48 by John Watson
Google XML Sitemaps: Version 4.0.9 by Arne Brachhold
Health Check: Version 1.0.0 by The WordPress.org community
Jetpack by WordPress.com: Version 5.8 by Automattic
SEO Ultimate: Version 7.6.5.9 by SEO Design Solutions
SyntaxHighlighter Evolved: Version 3.2.1 by Alex Mills (Viper007Bond)
### Inactive Plugins (11) ###
BuySellAds: Version 2.3.7.1 by Derek Herman
Cloudflare: Version 3.3.2 by John Wineman, Furkan Yilmaz, Junade Ali (Cloudflare Team)
Google AdSense: Version 1.2.1 by Google
Google Analytics for WordPress by MonsterInsights: Version 7.0.0 by MonsterInsights
Hello Dolly: Version 1.6 by Matt Mullenweg
iThemes Security: Version 6.9.0 by iThemes
My Page Order: Version 4.3 by Andrew Charlton
Quick Page/Post Redirect Plugin: Version 5.1.8 by anadnet
WP-Optimize: Version 2.2.0 by David Anderson, Ruhani Rabin, Team Updraft
WP Smush: Version 2.7.8 by WPMU DEV
Yoast SEO: Version 6.3.1 by Team Yoast
### Media handling ###
Active editor: WP_Image_Editor_GD
Imagick Module Version: Imagick not available
ImageMagick Version: Imagick not available
GD Version: bundled (2.1.0 compatible)
Ghostscript Version: 9.05
### Server ###
Server architecture: Linux 4.9.36mtv22 x86_64
PHP Version: 5.6.21 (Supports 64bit values)
PHP SAPI: cgi-fcgi
PHP max input variables: 1000
PHP time limit: 120
PHP memory limit: 256M
Max input time: -1
Upload max filesize: 99M
PHP post max size: 99M
cURL Version: 7.26.0 OpenSSL/1.0.1t
SUHOSIN installed: No
Is the Imagick library available: No
### Database ###
Extension: mysqli
Server version: 5.6.33-79.0
Client version: mysqlnd 5.0.11-dev - 20120503 - $Id: 76b08b24596e12d4553bd41fc93cccd5bac2fe7a $
Database prefix: wp_
### WordPress constants ###
ABSPATH: /nfs/c12/h03/mnt/220454/domains/mandarapte.com/html/
WP_HOME: Undefined
WP_SITEURL: Undefined
WP_DEBUG: Disabled
WP_MAX_MEMORY_LIMIT: 256M
WP_DEBUG_DISPLAY: Enabled
WP_DEBUG_LOG: Disabled
SCRIPT_DEBUG: Disabled
WP_CACHE: Disabled
CONCATENATE_SCRIPTS: Undefined
COMPRESS_SCRIPTS: Undefined
COMPRESS_CSS: Undefined
WP_LOCAL_DEV: Undefined
### Filesystem permissions ###
The main WordPress directory: Writable
The wp-content directory: Writable
The uploads directory: Writable
The plugins directory: Writable
The themes directory: Writable
The Must Use Plugins directory: Writable
Hmmm… loopback is successful. Can you edit a non-active theme?
Yes, I am able to successfully edit non active themes.
But If I edit active theme file WordPress deletes all of it’s code & make it zero kb file.
Moderator
Yui
(@fierevere)
永子
this may happen theoretically on some host (and filesystem with mount flags) combination with opcode cache.
Please dont edit active theme files )
Hello @mandarapte
Please have look at the possible causes and solution for the fatal error. I have already stated at https://wordpress.org/support/topic/cant-change-wordpress-php-file-showing-fatal-error/#post-10006121
Thank You
Moderator
Jan Dembowski
(@jdembowski)
Forum Moderator and Brute Squad
Side note to @mandarapte (and yes, I am using the notification system).
Don’t ping users here just to bump your topic. I’ve removed your reply, that is considered abusive behavior.
People, including moderators, volunteer here for free. When you ping that way you are spamming them. Don’t do that. It really is rude.
Edit: This goes for everyone. I really may create a trac ticket to disable that notification for users. It is abused too much.
