Not able to print variables of content type

Question

I want to print variables of a particular content type, but I have not found any way. Here is my code.

function mytheme_preprocess_node_mytype(&$vars) {   
  echo '<pre>';print_r($vars); echo '</pre>'; 
}

This function is in template.php. Is there a problem with my code?

Answer 1

Try this: (D7)

function YOURTHEME_preprocess_node(&$vars) {
  drupal_set_message('<pre>' . print_r($vars, true) . '</pre>');
}