Get entire page content (generated HTML in browser)

3 comments

1. You can use output buffering to accomplish this.

   Add a high priority hook directly before the template is rendered:

   add_action('template_redirect', 'foo_buffer_go', 0);
   function foo_buffer_go(){
       ob_start('foo_buffer_callback');
   }
   

   Add a shutdown hook with an extremely low priority.

   add_action('shutdown', 'foo_buffer_stop', 1000);
   function foo_buffer_stop(){
       ob_end_flush();
   }
   

   Inside your callback, you manipulate the rendered HTML.

   function foo_buffer_callback($buffer){
     //Do something with the buffer (HTML)
     return $buffer;
   }
   

   You may download this as a plugin here: http://3-3.me/B9lK

   1. Enable the plugin
   2. Visit the site and it will be rendered as “Foo Bar” which means you are capturing the entirety of the generated HTML

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2. Slight change to @BrianFegter’s code so the output buffer is closed only if it was opened. This has the benefit of being able to conditionally decide whether to filter or not.

   if ($want_to_modify_content) {
       add_action('template_redirect', 'YOURPLUGIN_buffer_start', 0);
   }
   function YOURPLUGIN_buffer_start() {
       add_action('shutdown', 'YOURPLUGIN_buffer_stop', PHP_INT_MAX);
       ob_start('YOURPLUGIN_modify_content'); 
   }
   function YOURPLUGIN_buffer_stop() {
       ob_end_flush();
   }
   function YOURPLUGIN_modify_content($content) {
       //modify $content
       return $content;
   }
   

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3. You can use HTTP API to get the content of the post URL.

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