代码如下：

if(!class_exists(\'ce_add_scripts\')){

    class ce_add_scripts{

        function __construct(){
            add_action(\'admin_init\', array(&$this,\'ceas_admin_init\'));
            add_action(\'admin_menu\', array(&$this,\'ceas_admin_menu\'));
            add_action(\'wp_head\', array(&$this,\'ceas_wp_head\'));
            add_action(\'wp_footer\', array(&$this,\'ceas_wp_footer\'));
        }

        function ceas_admin_menu(){
            add_submenu_page(
                \'tools.php\', 
                \'CE Add Scripts\', 
                \'CE Add Scripts\', 
                \'update_plugins\', 
                \'ceas_menu_page\', 
                array(&$this,\'ceas_page_callback\') );
        }

        function ceas_admin_init(){
            $args= array(
                \'type\'=>\'string\',
                \'default\'=>NULL,);

            register_setting(
                \'ceas_options\', 
                \'ceas_main_settings\', 
                $args);

            add_settings_section(
                \'ceas_options_section\',
                \'Insert Scripts to Head or Footer\',
                array(&$this,\'ceas_section_display\'),
                \'ceas_menu_page\');

            add_settings_field(
                \'ceas_options_field_0\',
                \'Head Script Entry\',
                \'ceas_head_script\',
                \'CE Add Scripts\',
                \'ceas_options_section\');

            add_settings_field(
                \'ceas_options_field_1\',
                \'Footer Script Entry\',
                \'ceas_footer_script\',
                \'CE Add Scripts\',
                \'ceas_options_section\');
        }

        function ceas_section_display(){
            echo \'Add scripts to the Head or Footer\';
        }

        function ceas_head_script(){
            $options = get_option(\'ceas_main_settings\');
            if(!isset($options[\'ceas_options_field_0\'])){
                $options[\'ceas_options_field_0\'] = \'\';
            }
            echo "<textarea cols=\'40\' rows=\'5\' name=\'ceas_main_settings[ceas_options_field_0]\'>";
            echo $options[\'ceas_options_field_0\'];
            echo "</textarea>";
        }

        function ceas_footer_script(){
            $options = get_option(\'ceas_main_settings\');
            if(!isset($options[\'ceas_options_field_1\'])){
                $options[\'ceas_options_field_1\'] = \'\';
            }
            echo "<textarea cols=\'40\' rows=\'5\' name=\'ceas_main_settings[ceas_options_field_1]\'>";
            echo $options[\'ceas_options_field_1\'];
            echo "</textarea>";
        }

        function ceas_page_callback(){

            echo "<div class=\'wrap\'>

            <form action=\'options.php\' method=\'post\'>

            <h1>CE Add Scripts Settings</h1>";

            settings_fields("ceas_options");
            do_settings_sections(\'ceas_menu_page\');
            $this->ceas_head_script();
            $this->ceas_footer_script();
            submit_button();


            echo "</form> 
            </div>";
        }

    }

    $ce_actualize= new ce_add_scripts();
}