My Custom Functions


An easy to use WordPress plugin that gives you the ability to easily and safely add your custome functions (PHP code) for execution in WordPress environment directly out of your WordPress Dashboard and without any need of an external editor.

It’s purpose is to provide a familiar experience to WordPress users. No need anymore editing the functions.php file of your theme. Just add your PHP code in the field on the plugin page and this plugin will do the rest for you.

This is a simple and perfect tool to use as your site’s functionality plugin.

It’s really useful in case of any theme update, because your custom PHP code would never be overwritten. Your custom PHP code will keep on working, no matter how many times you upgrade or switch your theme.

On the plugin page you find the PHP editor powered by CodeMirror. It have syntax highlighting and line numbering options. Also this editor support a tab indentation. If you want more options then tell me and I will be happy to add it.


  • Responsive & Mobile optimized settings page
  • Checks the entered code for fatal errors (simple checks)
  • Trigger for temporary disable the custom functions
  • Easy disable option for WSOD
  • Syntax highlighting (by CodeMirror)
  • Line numbering
  • Active line highlighting
  • Editor allow for tab indentation
  • Ready for translation (POT file included)

Coming soon:

  • Reload the settings page at same position after pushing the save button
  • Multisite network support


Please keep in mind that not all translations are up to date. You are welcome to contribute!

  • English (default)
  • Russian
  • Chinese-Taiwan (translation by Gordon Yu)
  • Spanish (translation by Ramiro Garcés)
  • French (translation by Theophil Bethel)

Consider Going Pro For Additional Features!

Pro Features

  • Unlimited number of functions
  • Automatic backup of all functions to a file
  • Trigger for temporary disable the certain functions
  • Button for collapse/expand the field with code
  • Sidebar items can be collapsed or expanded
  • Well documented

Get the premium version now!
“My Custom Functions” is one of the personal software projects of Arthur Gareginyan.


This plugin is licensed under the GNU General Public License, version 3 (GPLv3)
and is distributed free of charge.
Commercial licensing (e.g. for projects that can’t use an open-source license) is available upon request.


CodeMirror is an open-source project shared under the MIT license.



  • Plugin page.
  • Plugin page with custom code added.
  • Success message.
  • «Fatal error» message.


Install “My Custom Functions” just as you would any other WordPress Plugin.

Automatically via WordPress:

  1. Log into Dashboard of your WordPress website.
  2. Go to “Plugins” —> “Add New“.
  3. Find this plugin and click install.
  4. Activate this plugin through the “Plugins” tab.

Manual via FTP:

  1. Download a copy (ZIP file) of this plugin from
  2. Unzip the ZIP file.
  3. Upload the unzipped catalog to your website’s plugin directory (/wp-content/plugins/).
  4. Log into Dashboard of your WordPress website.
  5. Activate this plugin through the “Plugins” tab.

After installation, a “Custom Functions” menu item will appear in the “Appearance” section. Click on this in order to view plugin’s administration page.

More help installing Plugins


Q. Will this plugin work on my WordPress.COM website?

A. Sorry, this plugin is available for use only on self-hosted ( websites.

Q. Can I use this plugin on my language?

A. Yes. But If your language is not available then you can make one. This plugin is ready for translation. The .pot file is included and placed in “languages” folder. Many of plugin users would be delighted if you shared your translation with the community. Just send the translation files (*.po, *.mo) to me at the and I will include the translation within the next plugin update.

Q. Does this plugin require modification to the theme?

A. Absolutely not. This plugin is added/configured entirely from the website’s Admin section.

Q. How does it work?

A. Just place your PHP code to the field and click “Save Changes”. Example of PHP code:
function NameOfYourFunction {

    // Content of your function

Q. Can I use HTML/CSS/JS code integrated in PHP code?

A. Yes. But you need to do it properly, like this:
function NameOfYourFunction {

    echo "<script>
        // Your JS code

Q. How much of PHP code (characters) I can enter in the text field?

A. I don’t limit the number of characters.

Q. On the plugin settings page, an error message appears. What could be wrong?

A. Here are a few of the most likely causes of the error message:

  1. You make a syntax error in the code that you have entered. Check the syntax of your code and try again.
  2. You entered two functions with the same name. Use a unique names for your functions.
  3. You have entered function with a name that is already occupied by another function. Use a unique name for your function.
  4. You are trying to overwrite an existing function (of WordPress, theme, or plugin). Instead, use filters and hooks.
Q. It’s not working. What could be wrong?

A. As with every plugin, it’s possible that things don’t work. The most common reason for this is that the plugin has a conflict with another plugin you’re using. It’s impossible to tell what could be wrong exactly, but if you post a support request in the plugin’s support forum on, I’d be happy to give it a look and try to help out. Please include as much information as possible, including a link to your website where the problem can be seen.

Q. What to do if this plugin caused the white screen?

A. This plugin is not perfect, so there are times when the entered custom code causes the error and white screen (WSOD). If this happened with you then do the following.

Go to plugin folder (in wp-content/plugins/my-custom-functions/). Rename the “START” file to “STOP“. Then you can go to plugin settings page and edit your entered custom code. After editing, just rename the “STOP” file which you written before to “START“.

This plugin stored you entered code in the Database of your website. For getting your code, you also can go to the Database —> Table “wp_options” —> Option “anarcho_cfunctions_settings” —> “option_value“.

Q. Where to report bug if found?

A. Please visit Dedicated Plugin Page on GitHub and report.

Q. Where to share any ideas or suggestions to make the plugin better?

A. Please send me email

Q. I love this plugin! Can I help somehow?

A. Yes, any financial contributions are welcome! Just visit my website and click on the donate link, and thank you! My website


very useful

Simple install.
I was able to transfer all my custom code from the functions.php to the plugin page without any issues.

AWESOME plugin!!!!

I’ve been blogging for a while, but I’m very new when it comes to adding things like function code… What can I say… it intimidates me! But this plugin is super simple to use – even for noobs like me! I highly recommend this to EVERYONE!

Read all 28 reviews

Contributors & Developers

“My Custom Functions” is open source software. The following people have contributed to this plugin.


“My Custom Functions” has been translated into these 3 locales: Russian, Chinese (Taiwan), English (Canada). Thank you to the translators for their contributions.

Translate “My Custom Functions” into your language.

Interested in development?

Browse the code or subscribe to the development log by RSS.



  • Added French translation. (Thanks Theophil Bethel)
  • Image of the donate button changed.


  • Translations updated.
  • Readme for translations updated.
  • Link of banner image updated.



  • User’s PHP code displayed on settings page are escaped for output by htmlentities() instead of esc_attr() for prevent converting characters to HTML entities.
  • Added global constant for plugin text-domain.
  • Russian translation improved.


  • Added option for easy disable the custom code for cases of WSOD.
  • Style sheet of settings page improved.
  • On the settings page added an advertisement about the PRO version of this plugin.
  • The Readme.txt file improved.
  • Added the Readme.txt file for translation contribution.


  • Added prefixes to the stylesheet and script names when using wp_enqueue_style() and wp_enqueue_script().
  • Added constant for storing the plugin version number.


  • The structure of files changed.
  • Style sheet of settings page improved and better commented.
  • JS code improved.
  • The “thanks.png” image removed.
  • POT file updated.
  • Russian translation updated.
  • Chinese (Taiwan) translation updated.


  • The update_option() returned into _duplicates function.


  • Added active-line add-on to CodeMirror.
  • Extra update_option() removed from the _duplicates function.
  • The _exec function optimized.
  • CSS class “slider” renamed to “trigger”.
  • Styles of settings page optimized for mobile devices.
  • The styles.css file better commented.
  • The _enqueue_codemirror_scripts function renamed to mcstyles_load_scripts.


  • Added trigger for temporary disable the custom functions.
  • Functions _prepare, _duplicates, and _exec optimized.


  • Added function to check for duplicate function names. Compares the names of all functions (internal, user). The _duplicates function added.
  • Added function of automatic remove the “successful” message after 3 seconds.
  • Removed the default message about successful saving.
  • The function of user code cleaning modified.
  • File js-functions.js renamed to functions.js.
  • Removed my personal ad about freelance.


  • Added Chinese (Taiwan) translation. (Thanks Gordon Yu)
  • Text domain changed to “my-custom-functions”.
  • Added compatibility with the


  • In the settings_page.php, on the line 21, fixed typo.
  • Removed extra rules in style.css file.
  • All images are moved to the directory “images”.
  • Image “btn_donateCC_LG.gif” is now located in the “images” directory.


  • New design of settings page (new layout).
  • Constants variables added.
  • editor.js deleted.
  • js-functions.js (file with all js functions) created.
  • Prefixes changed to “MCFunctions”.
  • Text domain changed to “MCFunctions”.
  • Plugin URI changed to GitHub repository.
  • Added my personal ad about freelance.
  • .pot file updated.
  • Russian translation updated.


  • Authors URI changed.
  • Donate link changed.
  • Localization improved.
  • .pot file updated.
  • Russian translation updated.


  • The mode of CodeMirror editor changed from ‘application/x-httpd-php’ (HTML+PHP) to ‘text/x-php’ (PHP).
  • Placeholder of changed to “/* Enter Your Custom Functions Here */”.
  • Removed more unused do_action() from settings_page.php file.


  • The stylesheet of plugin’s page moved to separate file.
  • The javascript from settings_page.php moved to separate file.
  • Textdomain changed to “mcfunctions”.
  • Changed the style of title in plugin’s page.
  • The LICENSE file renamed to LICENSE.txt


  • Fixed the issue due to which nothing appears below line 26 until you click below that line.
  • Added “register_setting” for error option.
  • Corrected comments to source code.


  • CodeMirror scripts are combined and minified.


  • Fixed the issue due to which the alert message was appearing after installation.


  • .pot file included.
  • Minor fixes.


  • Added the syntax highlighting and line numbering.


  • Fixed positioning of the sidebar at the plugin page.


  • Initial release.
  • Added the check for safety execution code.
  • Added ready for translation.


  • Beta version.


  • Alfa version.