WordPress offers filter hooks to allow plugins to modify various types of internal data at runtime.
A plugin can modify data by binding a callback to a filter hook. When the filter is later applied, each bound callback is run in order of priority, and given the opportunity to modify a value by returning a new value.
The following example shows how a callback function is bound to a filter hook.
$example is passed to the callback, (maybe) modified, then returned:
If you want to know more, before adding your first add_filter(), see the below source. If it’s now your first time, see our collection of filters below.
For example: Google Maps iFrame
1. Find the Source URL:
This is a regular iFrame source from Google. The blue URL is an example of the URL you should copy.
iframe src=”https://www.google.com/maps/embed?pb=!1m18!1m12!1m3!1d19110.61969858318!” width=”600″ height=”450″ frameborder=”0″ style=”border:0″ allowfullscreen /iframe
2. Paste your source URL in the filter below
3. Add the above filter to your themes functions.php
- Find your themes functions.php in your website folder. It should look like wp-content/themes/(your-active-theme)/functions.php
* when using a child theme, please choose the functions.php from your child’s theme.
- Back-up your functions.php before adding the filter
- Add your filter using WordPad, Notepad or your favorite text editor.
- Save and overwrite your current functions.php. Keep your back-up ready if something happens.
4. It should now be removed from our Cookie Blocker list.
Are you using an API, or do you want to unblock other services? Have a look at all our other filters.