Title: adding function to Class
Last modified: August 22, 2016

---

# adding function to Class

 *  [Tom De Smedt](https://wordpress.org/support/users/steven_gardner/)
 * (@steven_gardner)
 * [11 years, 1 month ago](https://wordpress.org/support/topic/adding-function-to-class/)
 * Hi,
 * I’m learning to build a plugin with Classes and I’m stuck trying to take a function
   as place it inside my class and call it from there.
 * The ‘`sanitize_callback`‘ for my ‘`erynpro_global_css`‘ setting calls an external
   function. I want to place that function inside my class and call it from there.
 * Can someone help me achieve this.
 * Thanks
    Steven
 * My Class so far
 *     ```
       <?php
       /**
        * Plugin Name: *************
        * Plugin URI: **********
        * Description: *************
        * Version: ***********
        * Author: *****************
        * Author URI: *************
        * Text Domain: proeryn
        */
   
       if ( ! defined( 'ABSPATH' ) ) {
       	die();
       }
   
       class Eryn_plugin {
   
           protected $plugin_slug;
           private static $instance;
   
           public static function get_instance() {
               if( null == self::$instance ) {
                       self::$instance = new Eryn_plugin();
               }
               return self::$instance;
           } 
   
           private function __construct() {
   
                   add_action( 'customize_register', array( $this, 'eryn_plugin_register_theme_customizer' ));
                   add_action( 'wp_head', array( $this, 'eryn_plugin_customizer_css' ));
           } 
   
           public function eryn_plugin_register_theme_customizer( $wp_customize ){
   
               //Section
               $wp_customize->add_section( 'erynpro_custom_css' , array(
                   'title'         => __('Custom CSS', 'erynpro'),
                   'description'   => 'Add your custom CSS which will overwrite the theme CSS',
                   'panel'         => 'eryn_header_panel',
                   'priority'      => 999,
               ) );
   
               // Setting
               $wp_customize->add_setting('erynpro_global_css', array(
                   'sanitize_callback'	=> 'erynpro_sanitize_textarea',
               ));
   
               // Control
               $wp_customize->add_control(
                   new Customize_CustomCss_Control(
                       $wp_customize,
                       'custom_css',
                       array(
                           'label'      => __('Custom CSS', 'erynpro'),
                           'section'    => 'erynpro_custom_css',
                           'settings'   => 'erynpro_global_css',
                           'type'		 => 'custom_css',
                           'priority'	 => 9999
                       )
                   )
               );
           }
   
           public function eryn_plugin_customizer_css() {
               ?>
                   <style id="pro_eryn_css">
                       <?php if(get_theme_mod( 'erynpro_global_css' )) : ?>
                           <?php echo get_theme_mod( 'erynpro_global_css' ); ?>
                       <?php endif; ?>
                   </style>
               <?php
           }
   
       }
       add_action( 'after_setup_theme', array( 'Eryn_plugin', 'get_instance' ) );
   
       function Eryn_plugin_css_customize_register($wp_customize) {
   
           class Customize_CustomCss_Control extends WP_Customize_Control {
               public $type = 'custom_css';
   
               public function render_content() {
                   ?>
                   <label>
                   <span class="customize-control-title"><?php echo esc_html( $this->label ); ?></span>
                   <textarea style="width:100%; height:150px;" <?php $this->link(); ?>><?php echo $this->value(); ?></textarea>
                   </label>
                   <?php
               }
           }
       }
       add_action( 'customize_register', 'Eryn_plugin_css_customize_register' );
   
       function erynpro_sanitize_textarea($input) {
           global $allowedposttags;
           $output = wp_kses( $input, $allowedposttags);
           return $output;
       }
       ```
   

The topic ‘adding function to Class’ is closed to new replies.

## Tags

 * [class](https://wordpress.org/support/topic-tag/class/)
 * [development](https://wordpress.org/support/topic-tag/development/)

 * 0 replies
 * 1 participant
 * Last reply from: [Tom De Smedt](https://wordpress.org/support/users/steven_gardner/)
 * Last activity: [11 years, 1 month ago](https://wordpress.org/support/topic/adding-function-to-class/)
 * Status: not resolved

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