I'm creating a theme with woocommerce which has the following:

                     <?php if ( is_user_logged_in() ) { ?>
<a href="<?php echo get_permalink( get_option('woocommerce_myaccount_page_id') ); ?>" title="<?php _e('My Account','woothemes'); ?>"><?php _e('My Account','woothemes'); ?></a>
<?php }
else { ?>
<a href="<?php echo get_permalink( get_option('woocommerce_myaccount_page_id') ); ?>" title="<?php _e('Sign-in','woothemes'); ?>"><?php _e('Sign-in','woothemes'); ?></a>
<?php } ?>
                                                <li><a href="<?php echo get_option('home').'/'.'my-lists/'?>" title="My Wishlist">Wishlist</a></li>

<!--                <li><a href="#" title="Email updates">Email Updates</a></li>
-->                <li> <?php global $woocommerce; ?>

<a id="header-ShoppingCart" class="cart-contents" href="<?php echo $woocommerce->cart->get_cart_url(); ?>" title="<?php _e('View your shopping cart', 'woothemes'); ?>"><?php echo sprintf(_n('%d item', 'My Bag (%d)', $woocommerce->cart->cart_contents_count, 'woothemes'), $woocommerce->cart->cart_contents_count);?> - <span id="header-cartCount"><?php echo $woocommerce->cart->get_cart_total(); ?></span></a>



However this breaks the site if the woocommerce plugin is not activated. How can I check if the woocommerce plugin is activated?


You could check to see if the 'WooCommerce' class exists, then run the code that requires WooCommerce.

if ( class_exists( 'WooCommerce' ) ) {
  // code that requires WooCommerce
} else {
  // you don't appear to have WooCommerce activated
  • 1
    class_exists('WooCommerce') is going to return false, if the code is placed in functions.php while "activating plugin" ( the plugin is going to be activated after you check for WooCommerce class ). – justnorris Jan 28 '15 at 11:58
  • So this would be false if someone happened to load the page at the exact moment that the plugin was being activated? – hereswhatidid Jan 28 '15 at 14:49
  • 1
    You can't really load at the "exact moment", you can load 1ms before or after. It's important to pay attention here, because, if you declare some Woo function for a condition where WooCommerce doesn't exist ( like your own is_woocommerce() ), then you will receive a fatal error when trying to activate WooCommerce Plugin, because you will register your function first, and only then WooCommerce is going to try to register their is_woocommerce() function, and that is going to cause a fatal error and prevent WooCommerce plugin from ever activating. – justnorris Jan 29 '15 at 16:14
  • 1
    Right, but my point is that it would only fail if you declared a function that was also declared in WooCommerce. Simply detecting it's existence in a theme, as stated in the question, wouldn't be affected by this. – hereswhatidid Jan 30 '15 at 15:37
  • 1
    Yep, And I'm not arguing with you, I'm just posting relevant information, just in case someone decides to redeclare a function if WooCommerce doesn't exist – justnorris Feb 5 '15 at 9:38

To check if woocommerce or anyother plguin is active, paste the following code on the template where you want to display the message.

if ( in_array( 'woocommerce/woocommerce.php', apply_filters( 'active_plugins', get_option( 'active_plugins' ) ) ) ) {
    echo 'WooCommerce is active.';
} else {
    echo 'WooCommerce is not Active.';

Use following code. It will work on multi site also.

include_once( ABSPATH . 'wp-admin/includes/plugin.php' );
if(is_plugin_active( 'woocommerce/woocommerce.php')) return;

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