Wordpress Get Plugin Status

functions.php

<?php
/**
 * Check the status of a plugin.
 *
 * @param string $location Base plugin path from plugins directory.
 * @return int 1 if active; 2 if inactive; 0 if not installed
 */
function get_plugin_status($location = '') {

	if(is_plugin_active($location)) {
		return 1;
	}

	if(!file_exists(trailingslashit(WP_PLUGIN_DIR). $location)) {
		return false;
	}

	if(is_plugin_inactive($location)) {
		return 2;
	}
}

/**
 * Check the status of a plugin.
 */

$status = get_plugin_status('woocommerce/woocommerce.php');
switch($status) {
	case 1: echo 'Akismet is active.'; break;
	case 2: echo 'Akismet is installed but inactive.'; break;
	case 0: echo 'Akismet is not installed or active.'; break;
}

?>