Drupal - display field names and array #drupal

drupal-display-field-names.php

<?php // display all
  dsm(get_defined_vars()); 
?>

<?php //http://drupal.org/node/308732
  print '<pre>';
    var_dump(get_defined_vars()); 
  print '</pre>';
?>

<?php // display fields array
  dsm($field_name); 
?>

<?php // display array
  dsm(array_keys(get_defined_vars())); 
?>

<?php //print all array keys in a template
  print_r(array_keys($content)); 
?>

<?php dpm($content); ?>