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I have the following code fraction, but it does not work, I want that after activating a plugin this calls an action on the footer and prints something, but I can't do it, the problem seems that the admin_footer does not run, I don't know if activated_plugin is just before or after the html is printed so that the admin_footer, or how could I fix it?

add_action( 'activated_plugin', 'admin_activated_plugin' ); function admin_activated_plugin(){ // up to here if you run .... // but // the hook below doesn't add_action( 'admin_footer', 'after_activate_print_footer', 99 ); } function after_activate_print_footer(){ echo "something"; }

In conclusion, I want to print a text in the header or footer just after a plugin is activated

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Checking the action hooks API reference, "activated_plugin" is an Advanced hook. It operates outside the normal loop which would permit you to do what you want.

A better way would be to add_action('admin_footer_text'), as illustrated in this WPBeginner article.

However, if you only want this to show when a particular plugin is activated, you can add the following "if" statement to check if your plugin is active:

if (is_plugin_active($plugin_path)){ add_filter('admin_footer_text', '[your function here]'); }

If you only want this to run once, immediately after the plugin is activated, you might use your "activated_plugin" to set an option variable. Then, use your "admin_footer_text" action to check for and clear that option variable:

// Set the option indicating the plugin was just activated function wpse_set_activated(){ add_option("wpse_my_plugin_activated",'true'); } add_action("activated_plugin","wpse_set_activated"); // Setup conditional admin_footer text mod function wpse_setup_admin_footer_text(){ if (is_plugin_active("plugin_folder/my_plugin.php")){ $just_activated = get_option("wpse_my_plugin_activated",'false'); if ($just_activated !== 'true') { echo ""; } else { echo "My plugin is active"; delete_option("wpse_my_plugin_activated"); } // end if is_active } else { echo ""; }// end if is_plugin_active } add_filter('admin_footer_text', 'wpse_set_admin_footer_text');

Hope this helps!

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  • It is an elegant solution, add a cookie within the function "wpse_set_activated" and "wpse_setup_admin_footer_text" especially so that "wpse_setup_admin_footer_text" does not run just get_option, you must first know if the cookie is active from "wpse_set_activated" then enter and delete, just as you did but with cookie. Commented Dec 5, 2019 at 6:27

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