plugin-development - Read For Learn

how to set context in WordPress for unit testing

If you have phpUnit configured for testing a WP plugin, you can use a test case like this: In your plugin-directory/tests/Some_Test_Case.php: class Plugin_Test extends WP_UnitTestCase { /** * @dataProvider post_IDs_and_expected_results */ public function test_something( $post_id, $expected_result ) { global $post; $post = get_post( $post_id ); $plugin_content = call_plugin_function(); // Your function name here $this->assertEquals( $expected_result, … Read more

Unable to get content from $post on first publish

The third parameter for transition_post_status is the post object. Use it. add_action( ‘transition_post_status’, ‘dostuff’, 10, 3 ); function dostuff( $new_status, $old_status, $post ) { } When in doubt, do not use globals. They are not reliable, they make your code hard to test and to read.

Properly licensing a plugin that uses Apache 2.0 licensed code

From WordPress point of view — not much, beyond plugin’s header (and even there) it is hardly policed. From licensing point of view you obviously need to accommodate requirements of both licenses accordingly. At least — make clear that your combined work is under GPLv3 and which parts of it are based on Apache License … Read more

Create a plugin to change the action to which a function is hooked

You can use the remove_action() function to unhook a function from an action and then add_action() to hook it elsewhere. Note that when removing an action you must specify the tag (hook name), function, and priority exactly as it was added. Edit: Here are some additional details: You’ll have to look at the source of … Read more

What function to hook for changes made in status and visibility of a post

What I was looking for was transition_post_status. The documentation can be found here. What I did was to add one more filter add_filter(‘transition_post_status’,’myFunction’);

Is it possible to modify the media library admin screen?

That area of all admin screens is where admin notices are displayed, so you could generate an admin notice. Here’s a suitable function and hook: function wpse_233031_admin_notice() { ?> <div class=”notice notice-info”> <p>Your message here!</p> </div> <?php } function wpse_233031_hook_admin_notice() { add_action( ‘admin_notices’, ‘wpse_233031_admin_notice’ ); } add_action( ‘load-upload.php’, ‘wpse_233031_hook_admin_notice’ ); /* Edited out anonymous function … Read more

Does add_filter work outside functions.php

The functions for filter and action manipulation are available at any point after WordPress loads wp-includes/plugin.php – this happens quite early as much of WordPress itself depends on these functions, so they are always accessible to theme and plugin files alike. You need to add header information to your file such that WordPress may recognize … Read more

How to duplicate a curl XML request using HTTP API?

I tried some more trial and error and managed to get it to work by simply putting $xml as the body without specifying it as an array. The function reference says, “Post data should be sent in the body as an array,” so I’m not sure why it worked. Here is the working code in … Read more

What is the best way to overwrite /wp-admin/ms-delete-site.php

Another alternative is to look at the hook map_meta_cap and remove the user’s capability to delete_site. If you have a restricted set of users or context when you want to allow delete_site then you can allow the capability.

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