custom error message instead of FATAL ERROR in WordPress plugin activation if WooCommerce is not acive

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I am trying to give a graceful custom message upon activation of the plugin, if Woocommerce is not activated. 

if ( in_array( 'woocommerce/woocommerce.php', apply_filters( 'active_plugins', get_option( 'active_plugins' ) ) ) ) {

The above express is to check whether Woocommerce is active and if it returns false, I do not want the plugin to be activated and wants to throw a custom error. I have tried to stop execution with die() and trigger_error. In these cases, it shows a FATAL ERROR.

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3 comments

  1. What I usually do is throw and admin notice if WooCommerce isn’t available. And then just stop the running of your plugin. 

    if ( ! in_array( 'woocommerce/woocommerce.php', apply_filters( 'active_plugins', get_option( 'active_plugins' ) ) ) ){
    add_action( 'admin_notices', 'so_32551934_woocommerce_warning' );
    return; // STOP THE WHOLE PLUGIN
}

function so_32551934_woocommerce_warning(){ ?>
    <div class="error">
        <p><?php _e( 'Whoa, you're gonna need WooCommerce to run my fancy plugin!', 'my-text-domain' ); ?></p>
    </div>
   <?php 
}

// The rest of your plugin follows here

    Any code that you put here at the end will be run as long as WooCommerce is active. Note, I didn’t test this so be careful of typos.

  2. Have a look at deactivate_plugins function . Try this:

    class MyPlugin {

        public function __construct() {
                register_activation_hook( __FILE__, array( $this , 'activate' ) );
        }

        public function activate() {

                // Check if Woo is active
                if ( in_array( 'woocommerce/woocommerce.php', apply_filters( 'active_plugins', get_option( 'active_plugins' ) ) ) ) {

                        // Woo is active.

                } else {

                        deactivate_plugins( plugin_basename( __FILE__ ) );
                        wp_die( __( 'Please activate WooCommerce.', 'my-plugin' ), 'Plugin dependency check', array( 'back_link' => true ) );

                }

                // Do activate Stuff now.
        }
}

new MyPlugin();

  3. Here my solution:

        class FT_AdminNotice {

       /**
       * Register the activation hook
       */
       public function __construct() {
          register_activation_hook( __FILE__, array( $this, 'ft_install' ) );
       }

      /**
      * Deactivate the plugin and display a notice if the dependent plugin is not active.
      */
      public function ft_install() {
          if ( ! class_exists( 'WooCommerce' ) ) 
          {
               $this->ft_deactivate_plugin();
               wp_die( sprintf(__( 'This plugin requires Woocommerce to be installed and activated.', 'domain-text' ) ) );
          }
      }

      /**
      * Function to deactivate the plugin
      */
      protected function ft_deactivate_plugin() {
           require_once( ABSPATH . 'wp-admin/includes/plugin.php' );
           deactivate_plugins( plugin_basename( __FILE__ ) );
           if ( isset( $_GET['activate'] ) ) {
                 unset( $_GET['activate'] );
           }
      }

   }

   new FT_AdminNotice();

    This way show message and you can enrich it like explain here and stop execution too.

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