I am using the following filter to run a function that generates a CSS file after a plugin gets updated. Currently the CSS gets generated when any plugin gets updated. Is there a simple way to limit this running to a particular plugin?

add_filter('upgrader_post_install', 'generate_my_css', 100, 0);

function generate_my_css() {
    $ss_dir = get_stylesheet_directory();
    $pi_dir = plugin_dir_path( __FILE__ );
    require($pi_dir . 'includes/css/mycss.php');
    $css = ob_get_clean();
    file_put_contents($ss_dir . '/css/mycss.css', $css, LOCK_EX);

Ideally the above code would live in the plugin that was being updated but could just as easily live in the functions.php

  • 1
    Important things to show in your question when you edit it: 1. Where this code is being initialized. 2. How you have NAMESPACED the very simply named restore function. 3. The code that is in the function restore; Jan 20, 2016 at 4:37
  • Hopefully the above will explain a bit better.
    – PthPndr
    Jan 20, 2016 at 12:19

2 Answers 2


upgrader_post_install has three parameters $response, $hook_extra and $result which give you extra information. At the moment I can't take a look myself, but I'm assuming that especially the $result variable should give you additional information to differentiate.

  • The $result actually contained a lot of information but the $hook_extra just contained the plugin_basename which worked out perfectly.
    – PthPndr
    Jan 21, 2016 at 12:14

function upgrader_post_install_func($response,$hook_extra,$result){
          visualizar $result y $hook_extra, se guarda en carpeta wp-content.
      #file_put_contents(WP_CONTENT_DIR . '/test.txt', serialize($result)."\r\n", FILE_APPEND);

    /* renombrar complemento actualizado desde github zipball, para mantener 
       actualizaciones dado que github al descargar zip y descomprimirlo lo pone en 
       este formato: <usuario github>-<nombre repo>-<codigo version>
       y se necesita <nombre repo>-<main | master>
    $plugin = explode('/', $hook_extra['plugin']); 
    rename(WP_PLUGIN_DIR .'/'. $result['destination_name'],WP_PLUGIN_DIR .'/'.$plugin[0]);
    return $result;

Espero ser de ayuda.

  • 1
    Please edit your answer, and add an explanation: why could that solve the problem?
    – fuxia
    Dec 22, 2021 at 8:41

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