404 Error Mod

404 Error Mod
Summary	Displays a 404 ERROR page.
Validation	Latest mod is XHTML compliant.
Mod Updated	18 Sep 2024
Download link	404 Error Mod v14.0.0.9 TNG 14.0
Download stats	Downloads Stats
Author(s)	Steven Davis
Homepage	404 Error Mod (This page)
Mod Support	TNG Community Forums
Contact Developer	Steven Davis
Latest Mod	14.0.0.9
Min TNG V	14.0
Max TNG V	14.0.5
Files modified	ahnentafel.php ajx_fampreview.php ajx_perspreview.php browse_dna_tests.php compare_selected_atdna.php compare_selected_dna.php compare_selected_mtdna.php compare_selected_ydna.php familygroup.php fan.php globallib.php img_viewer.php pedigree.php show_dna_test.php showalbum.php showmap.php showmedia.php showmediaxmllib.php showrepo.php showreport.php showsource.php verticalchart.php
Related Mods	Person Not Found Mod Source Not Found Mod
Notes	Some templates, like 19 and 21, may require changing or commenting out the 404_page.php inline CSS for the go back button.

Purpose of the mod

This TNG modification was written to give users a TNG error page instead of a blank page which may cause them to abandon your website. Replaces thispagedoesnotexist.html with a modified existing TNG function.

Developer

This mod was developed by Steven Davis.

Advantages

• Sends a 404 status code and displays an error page when a page is not found.
• Creates an optional 404_error_log.txt file so administrators can correct bad links.
• Error pages are shown for DNA, cemeteries, documents, families, histories, media, people, sources etc.
• Uses the active template to display the error page.
• Includes a custom cfg file in the mod folder to add a custom page with messages and links.
• The custom cfg file includes most languages.

Requirements

• A working TNG installation.
• A backup of all affected files (see the list in the summary to the right)
• An installed current version of the Mod Manager.

Revision History

Mod Version	TNG Version	Date	Contents
14.0.0.9	14.0+	18 Sep 2024	Added an optional configuration file to install languages and rewrote the custom page.
14.0.0.7	14.0+	15 Sep 2024	Fixed PHP undefined variable warning
14.0.0.6	14.0+	07 May 2024	Records IP address in the 404 log file
14.0.0.5a	14.0+	25 Dec 2023	Changed inline CSS styling so mytngstyle.css can override the default CSS. Added additional instructions for creating a custom 404 page.
14.0.0.5	14.0+	22 Dec 2023	Reworked mod so 404-page.php file is optional. Added changing the default error message without using the 404-page.php file. Removed languages so custom error messages and links can be used. Added an example text file for creating messages in the cust_text.php file(s) for the active language(s). Fixed some typos from prior versions that caused errors.
14.0.0.4	14.0+	20 Dec 2023	Separated the 404 file from the cfg file.
14.0.0.3	14.0+	18 Dec 2023	Creates a 404 error log text file. This will show any 404 error which includes users adding characters in the URL.
14.0.0.2	14.0+	16 Dec 2023	First version released publically

Conflicts and Issues

Person Not Found Mod and Source Not Found Mod
If these mods are installed and a person or source is not found, an additional message will be displayed at the top of either the getperson.php or showsource.php page.

Installation

1. Uninstall and delete previous version of this mod (if installed)
2. Download the appropriate zip file as shown in the mod summary in the upper right corner of the page.
3. Extract the contents from the downloaded zip file into the mods folder or FTP the extracted contents to your mods folder.
4. Follow the normal automated installation for Mod Manager, as shown in the example Mod Manager - Installing Config Files to install the mod.
5. To use different languages with a custom page, copy the 404_error_custom_page_v14.0.0.9.cfg from the 404_file_v14.0.0.9 folder to the TNG mods folder and install.
   

Using the 404_error_custom_page_v14.0.0.9.cfg is optional

In the event of a problem

• Try using the Mod Manager Remove capability.
• Copy the backup of the affected files back to your TNG directory.
• Retry installing mod.
• Contact us through the TNG Community Forums.

Uninstalling the mod

If you want to completely Remove (uninstall) this mod you should

1. click the Uninstall button to uninstall the mod.
2. click the Delete button to delete the config file from the mods folder.
3. manually Delete the 404_error_log.txt file from the TNG folder if it exists.
4. manually Delete the 404_file folder from the TNG mod folder if Mod Manager does delete the folder.
5. manually Delete the 404_page.php file from the TNG folder if it exists.

Upgrade

• Uninstall and eventually Delete the current Mod and associated Mod folder.
• Proceed as for an installation with the new Mod.
• To upgrade to version 14.0.0.8, replace the existing 404_page.php file with the new file.
• if you customized the 404_page.php file, transfer your changes to the new 404_page.php file.

Visualization

Test the mod by displaying an individual then, in the browser url, and type some extra zeros after the person id= and press enter.
The following screens show the page when the 404 error occurs:

404 ERROR PAGE This is the default page and language that appears after the mod is installed

404 ERROR PAGE with alternate error message Message changed after installing the 404_page.php file

404 ERROR PAGE with with default error message and buttons Requires the 404_page.php file

Page URL status with mod installed

Sites using this mod

If you download and install this mod, please add your TNG site to the table below:

URL	User	Note	Mod-Version	TNG-Version	User-language
Family Histories	Steven Davis	Mod developer	14.0.0.9	TNG 14.0.5	EN
MOTYER Family Genealogy	John Mark Motyer	Public site	See here	See here	EN
Our Roy and Boucher Family	Ken Roy	Replaces Person Not Found Mod and Source Not Found Mod mods	14.0.0.9	TNG 14.0.5	EN,FR
Chris Korte's New Zealand Genealogy Project	Chris Korte	Public / Private	14.0.0.9	TNG 14.0.5	DA,EN,FR,DE
The Duttons of New England	Darrin Dutton	Public / Private	14.0.0.9	TNG 14.0.5	EN