title: Wordpress how to get the text that is in the content textarea on the edit post page
body: <p>How do i get the text that is in the "content" textarea, of the edit post page, when saving post</p>
  
  <p>example:</p>
  
  <pre><code>class Class {
      function save() {
          echo "content of textarea";
      }
  
  }
  if( class_exists( 'Class' ) ) {
      $Class = new Class();
          add_action( 'save_post', array(&amp;$Class, 'save') );
  }
  </code></pre>
  
  <p>more specifically, the textarea that has the text you type in when creating or editing a post is called id="content", I want to get the text from this box when clicking update button when saving a post.</p>