Breaks user interface

Whenever I activate the plugin, this is appended above the interface, as seen from the other users

shatner_label = get_option('shatner_label', "Name your own price"); wp_enqueue_script('shatner', plugins_url('/shatner.js',__FILE__), array('jquery') ); if ( is_admin() ){ // admin actions $this->init_form_fields(); add_action( 'admin_menu', array($this, 'add_shatner_menu' )); add_action( 'admin_init', array($this, 'admin_init' )); add_action('woocommerce_before_calculate_totals', array($this, 'add_custom_price' )); add_action('woocommerce_product_options_pricing', array($this, 'add_donation_radio')); add_action('save_post', array($this, 'set_named_price')); } else { if(get_option('use_shatner_templates', 1 ) == 1) { add_filter('woocommerce_locate_template', array($this, 'template_override'),10,3); add_filter('woocommerce_loop_add_to_cart_link', array($this, 'remove_link'),10); } add_action('woocommerce_product_options_pricing', array($this, 'add_donation_radio')); add_action('save_post', array($this, 'set_named_price')); add_action('woocommerce_add_to_cart', array($this, 'add_to_cart_hook')); add_action('woocommerce_before_calculate_totals', array($this, 'add_custom_price' )); add_action('init', array($this, 'init_css')); } } public function remove_link($link) { global $post; $post = get_post_meta($post->ID, '_own_price', true); if ($post === 'yes') return ''; return $link; } public function add_shatner_menu() { add_options_page( 'Shatner Plugin Settings', 'Shatner Settings', 'manage_options', 'shatner_plugin', array($this, 'shatner_plugin_settings_page') ); } public function shatner_plugin_settings_page() { include(sprintf("%s/templates/settings.php", dirname(__FILE__))); } /** * hook into WP's admin_init action hook */ public function admin_init() { // add your settings section add_settings_section( 'wp_plugin_template-section_shatner', 'Shatner Plugin Template Settings', array($this, 'settings_section_shatner_plugin_template'), 'wp_plugin_template_shatner' ); foreach($this->form_fields as $setting) { // register your plugin's settings register_setting('wp_plugin_template-group-shatner', $setting['title']); // add your setting's fields add_settings_field( $setting['title'], $setting['description'], array(&$this, 'settings_field_input_'. $setting['type']), 'wp_plugin_template_shatner', 'wp_plugin_template-section_shatner', array( 'field' => $setting['title'] ) ); } } // END public static function activate public function init_form_fields() { $this->form_fields = array( array( 'type' => 'text', 'title' => __('shatner_label', 'woothemes'), 'description' => __('Shatner Label', 'woothemes'), 'default' => __('Name your own price', 'woothemes') ), array( 'type' => 'radio_button', 'title' => __('use_shatner_templates', 'woothemes'), 'description' => __('Shatner Templates override pricing, disable if you want to customize using your theme', 'woothemes'), 'default' => __('1', 'woothemes') ) ); } public function settings_section_shatner_plugin_template() { // Think of this as help text for the section. echo 'These settings set values for Shatner'; } /** * This function provides text inputs for settings fields */ public function settings_field_input_text($args) { // Get the field name from the $args array $field = $args['field']; // Get the value of this setting $value = get_option($field); // echo a proper input type="text" echo sprintf('
%s
', $field, $field, $value); } // END public function settings_field_input_text($args) /** * This function provides text inputs for settings fields */ public function settings_field_input_radio_button($args) { // Get the field name from the $args array $field = $args['field']; // Get the value of this setting $value = get_option($field); $html = ' '; $html .= ' Enable
'; $html .= '  '; $html .= ' Disable'; echo $html; } // END public function settings_field_input_radio($args) public function template_override($template, $template_name, $template_path ) { // Modification: Get the template from this plugin, if it exists $plugin_path = untrailingslashit( plugin_dir_path( __FILE__ ) ). '/templates/'; if ( file_exists( $plugin_path . $template_name ) ) { $template = $plugin_path . $template_name; return $template; } return $template; } public function init_css() { wp_register_style('donation_css', plugins_url('custom_styles.css',__FILE__ ), false, '1.0.1', 'all'); wp_enqueue_style( 'donation_css' ); } public function add_to_cart_hook($key) { global $woocommerce; foreach ($woocommerce->cart->get_cart() as $cart_item_key => $values) { if(!get_post_meta($values['product_id'], '_own_price', true ) || get_post_meta($values['product_id'], '_own_price', true ) === 'no') { $values['data']->set_price($_POST['price']); continue; } $thousands_sep = wp_specialchars_decode( stripslashes( get_option( 'woocommerce_price_thousand_sep' ) ), ENT_QUOTES ); $decimal_sep = stripslashes( get_option( 'woocommerce_price_decimal_sep' ) ); $_POST['price'] = str_replace($thousands_sep, '', $_POST['price']); $_POST['price'] = str_replace($decimal_sep, '.', $_POST['price']); $_POST['price'] = woocommerce_format_total($_POST['price']); error_log(var_export($_POST,1)); if($cart_item_key == $key) { $values['data']->set_price($_POST['price']); $woocommerce->session->__set($key .'_named_price', $_POST['price']); } } return $key; } public function set_named_price($post) { if($_POST['_own_price']){ if(!get_post_meta($_POST['post_ID'], '_own_price', true )){ add_post_meta($_POST['post_ID'], '_own_price', $_POST['_own_price']); } else { update_post_meta($_POST['post_ID'], '_own_price', $_POST['_own_price']); } } if($_POST['_own_price_enforce_minimum']){ if(!get_post_meta($_POST['post_ID'], '_own_price_enforce_minimum', true )){ add_post_meta($_POST['post_ID'], '_own_price_enforce_minimum', $_POST['_own_price_enforce_minimum']); } else { update_post_meta($_POST['post_ID'], '_own_price_enforce_minimum', $_POST['_own_price_enforce_minimum']); } } } public function add_donation_radio($content) { global $post; woocommerce_wp_radio(array( 'id' => '_own_price', 'class' => 'wc_own_price short', 'label' => __( 'Name your own price', 'woocommerce' ), 'options' => array( 'yes' => 'yes', 'no' => 'no', ) ) ); woocommerce_wp_radio(array( 'id' => '_own_price_enforce_minimum', 'class' => 'wc_own_price_e short', 'label' => __( 'Enforce minimum price (Regular Price)', 'woocommerce' ), 'options' => array( 'yes' => 'yes', 'no' => 'no', ) ) ); } public function add_custom_price( $cart_object ) { global $woocommerce; foreach ( $cart_object->cart_contents as $key => $value ) { if(!get_post_meta($value['product_id'], '_own_price', true ) || get_post_meta($value['product_id'], '_own_price', true ) === 'no') { continue; } $named_price = $woocommerce->session->__get($key .'_named_price'); if($named_price) { $value['data']->price = $named_price; } } } } new SV_WC_Donation();

Please fix it…

https://www.ads-software.com/plugins/shatner-name-your-own-price-for-woocommerce/