pootlepress-fontawesome-menu-functions.php

<?php
$health = 'ok';

if (!function_exists('check_main_heading')) {
    function check_main_heading() {
        global $health;
        if (!function_exists('woo_options_add') ) {
            function woo_options_add($options) {
                $cx_heading = array( 'name' => __('Canvas Extensions', 'pootlepress-canvas-extensions' ),
                    'icon' => 'favorite', 'type' => 'heading' );
                if (!in_array($cx_heading, $options))
                    $options[] = $cx_heading;
                return $options;
            }
        } else {	// another ( unknown ) child-theme or plugin has defined woo_options_add
            $health = 'ng';
        }
    }
}

add_action( 'admin_init', 'poo_commit_suicide' );

if(!function_exists('poo_commit_suicide')) {
    function poo_commit_suicide() {
        global $health;
        $pluginFile = str_replace('-functions', '', __FILE__);
        $plugin = plugin_basename($pluginFile);
        $plugin_data = get_plugin_data( $pluginFile, false );
        if ( $health == 'ng' && is_plugin_active($plugin) ) {
            deactivate_plugins( $plugin );
            wp_die( "ERROR: <strong>woo_options_add</strong> function already defined by another plugin. " .
                $plugin_data['Name']. " is unable to continue and has been deactivated. " .
                "<br /><br />Please contact PootlePress at <a href=\"mailto:support@pootlepress.com?subject=Woo_Options_Add Conflict\"> support@pootlepress.com</a> for additional information / assistance." .
                "<br /><br />Back to the WordPress <a href='".get_admin_url(null, 'plugins.php')."'>Plugins page</a>." );
        }
    }
}
?>