Theme Activate Hook

5 comments

1. I have that code here just name the file theme_activation_hook.php like on the website and copy this.

   <?php
   /**
    * Provides activation/deactivation hook for wordpress theme.
    *
    * @author Krishna Kant Sharma (http://www.krishnakantsharma.com)
    *
    * Usage:
    * ----------------------------------------------
    * Include this file in your theme code.
    * ----------------------------------------------
    * function my_theme_activate() {
    *    // code to execute on theme activation
    * }
    * wp_register_theme_activation_hook('mytheme', 'my_theme_activate');
    *
    * function my_theme_deactivate() {
    *    // code to execute on theme deactivation
    * }
    * wp_register_theme_deactivation_hook('mytheme', 'my_theme_deactivate');
    * ----------------------------------------------
    * 
    * 
    */
   
   /**
    *
    * @desc registers a theme activation hook
    * @param string $code : Code of the theme. This can be the base folder of your theme. Eg if your theme is in folder 'mytheme' then code will be 'mytheme'
    * @param callback $function : Function to call when theme gets activated.
    */
   function wp_register_theme_activation_hook($code, $function) {
       $optionKey="theme_is_activated_" . $code;
       if(!get_option($optionKey)) {
           call_user_func($function);
           update_option($optionKey , 1);
       }
   }
   
   /**
    * @desc registers deactivation hook
    * @param string $code : Code of the theme. This must match the value you provided in wp_register_theme_activation_hook function as $code
    * @param callback $function : Function to call when theme gets deactivated.
    */
   function wp_register_theme_deactivation_hook($code, $function) {
       // store function in code specific global
       $GLOBALS["wp_register_theme_deactivation_hook_function" . $code]=$function;
   
       // create a runtime function which will delete the option set while activation of this theme and will call deactivation function provided in $function
       $fn=create_function('$theme', ' call_user_func($GLOBALS["wp_register_theme_deactivation_hook_function' . $code . '"]); delete_option("theme_is_activated_' . $code. '");');
   
       // add above created function to switch_theme action hook. This hook gets called when admin changes the theme.
       // Due to wordpress core implementation this hook can only be received by currently active theme (which is going to be deactivated as admin has chosen another one.
       // Your theme can perceive this hook as a deactivation hook.
       add_action("switch_theme", $fn);
   }
   

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2. I have written a code which provides a reliable activation/deactivation theme hooks. Please check it out and let me know what you guys think!

   http://www.krishnakantsharma.com/2011/01/activationdeactivation-hook-for-wordpress-theme/

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3. There is no specialized hook for this. I have seen couple of approaches:

   • switch_theme hook with checking for your theme – Execute “Setup” Code on Activation only?
   • detecting admin page after theme activation – Set options on activation Themes

   I want to note that emailing yourself any information without user’s consent (and running anything on activation has no opportunity to request such) can be viewed as inappropriate.

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4. WordPress now provides this hook as after_switch_theme. You can use it like so:

   add_action('after_switch_theme', 'my_theme_activation');
   
   function my_theme_activation () {
     // DO ALL THE THINGS
   }
   

   You can use the switch_theme hook to run code on theme deactivation as well.

   Source: http://codex.wordpress.org/Plugin_API/Action_Reference/after_switch_theme

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5. Place this code at the top in your functions.php

   <?php if ( is_admin() && isset($_GET['activated'] ) && $pagenow == "themes.php" ) {
   // do your stuff
   $url = get_site_url();
   // The message
   $message = "a new wordpress theme is activated on $url ";
   
   // In case any of our lines are larger than 70 characters, we should use wordwrap()
   $message = wordwrap($message, 70, "rn");
   
   // Send
   wp_mail('mail@yourdomain.com', 'theme geactiveerd', $message);
   }
   
   ?>
   

   replace mail@yourdomain.com with your own email address.

   Hope it helps.

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