activation - Read For Learn

Auto add content such as pages upon plugin activation?

You can add those without a button: register_activation_hook( __FILE__, ‘my_plugin_install_function’); function my_plugin_install_function() { //post status and options $post = array( ‘comment_status’ => ‘closed’, ‘ping_status’ => ‘closed’ , ‘post_author’ => 1, ‘post_date’ => date(‘Y-m-d H:i:s’), ‘post_name’ => ‘Checklists’, ‘post_status’ => ‘publish’ , ‘post_title’ => ‘Checklists’, ‘post_type’ => ‘page’, ); //insert page and save the id $newvalue … Read more

Unexpected Output: register_activation_hook with namespace

When we are outside the Sample namespace, we should call the function by \Sample\sp_activate(), so please try the following: <?php /** * Plugin Name: Sample Plugin * Version: 0.0.2 */ namespace Sample; \register_activation_hook( __FILE__, ‘\Sample\sp_activate’ ); function sp_activate() { } If something is printed out during the plugin activation it will result in unexpected output … Read more

How to include plugin without activation?

WP_PLUGIN_DIR.’/pluginName/’ will give you the absolute path to the directory of the plugin. EDIT After comment Plugins are plugins, theme files are theme files. Lets not confuse the two. You cannot copy a plugin in the theme directory – because stuff does not work like that. After careful editing you can include the plugin as … Read more

Unable to activate wordpress importer after installing it

That error suggests that the WXR_Parser class is already “running” or declared. It’s possible that a theme or another plugin has incorporated that class and did not check if it existed already before initializing. ie. if ( ! class_exists( ‘WXR_Parser’ ) ). To locate the source of the conflict, deactivate each theme and plugin one-by-one. … Read more

Settings not set after calling register_setting()

register_setting does not insert anything in the database. It’s supposed to be run in admin_init, not just on activation, and is for building options pages with the Settings API and handles things like sanitisation and permissions when saving options in the admin. If you want to add some default option values to the database on … Read more

wordpress in nginx docker container connected to php:8-fpm container and mariadb container isn’t creating any tables on plugin activation

Not sure if it is related, but just in case, as for the last time I looked at it WP core 5.8 have bugs in dbdelta relating to MySQL 8 when integers are involved. Latest MariaDb seems to do better. I would assume that as of 5.8 core is not ready to be deployed on … Read more

How to create a page when a theme is activated?

There is a hook specifically for this purpose, called after_switch_theme. You can hook into it and create your personal page after theme activation. Have a look at this: add_action( ‘after_switch_theme’, ‘create_page_on_theme_activation’ ); function create_page_on_theme_activation(){ // Set the title, template, etc $new_page_title = __(‘About Us’,’text-domain’); // Page’s title $new_page_content=””; // Content goes here $new_page_template=”page-custom-page.php”; // The … Read more

Cannot run the code after I activate the plugin

you can not, and should not be able to write to files directly. You need to use the wordpress filesystem api https://codex.wordpress.org/Filesystem_API which either requires a pre configuration on the site or user manual control. In addition it is just wrong to automatically write anything into wp-config.php as any mistake will bring down the site … Read more

Correct way to use register_activation_hook

This quotation from The Codex clearly states what does this function do: The register_activation_hook function registers a plugin function to be run when the plugin is activated. This means, this function works similar as a class’s __construct() method. You can use it to set initial options, update database, and more. It doesn’t run every time … Read more

The plugin generated x characters of unexpected output, $wpdb not defined

$wpdb is outside the scope of your plugin file, you need global $wpdb; before using $wpdb->prefix

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