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<?phpfunction themename_theme($existing, $type, $theme, $path) {  return array(    ...    // tell Drupal what template to use for the user register form    'user_register' => array(      'arguments' => array('form' => NULL),      'template' => 'user-register', // this is the name of the template    ),    ...  );}?>

<div id="registration_form">  <div class="field">    <?php      print drupal_render($form['account']['name']); // prints the username field    ?>  </div>  <div class="field">    <?php      print drupal_render($form['account']['pass']); // print the password field    ?>  </div>  <div class="field">    <?php        print drupal_render($form['submit']); // print the submit button      ?>    </div>  </div></div>

<?php  print '<pre>';  print var_export($form);  print '</pre>';?>

One issue that comes up from ApacheSolr being a separate search page is that the search form does not go to it by default. This is the $search_box in the page.tpl.php template. The way we change this behavior is to add a new submission handler to that form. You can create a custom module for this or put it in your custom theme. <?php/*** Implementation of hook_form_alter()*/function custommodule_form_alter(&$form, $form_state, $form_id) {  // Add submission handler to redirect to apachesolr  if ($form_id == 'search_theme_form') {    // Add a submit, because the search form redirects to a specific place    $form['#submit'][] = 'custommodule_search_submit';  }}/*** Implementation of form submit function*/function custommodule_search_submit($form, &$form_state) {  // Get form ID  $form_id = $form['form_id']['#value'];  // Create new redirect  $form_state['redirect'] = 'search/apachesolr_search/'. trim($form_state['values'][$form_id]);}?>

Always use content_database_info to get the database info. For example:   $field1 = content_database_info(content_fields('yourfield1', 'yourtable'));  $table1 = $field1['table'];  $column1 = $field1['columns']['value']['column'];  $field2 = content_database_info(content_fields('yourfield2', 'yourtable'));  $table2 = $field2['table'];  $column2 = $field2['columns']['value']['column'];  if ($table1 == $table2) {    $sql = "SELECT n.*, t1.$column1, t1.$column2 FROM {node} n ";    $sql .= " INNER JOIN {$table1} t1 ON t1.nid = n.nid AND t1.vid = n.vid";  }  else {    $sql = "SELECT n.*, t1.$column1, t2.$column2 FROM {node} n ";    $sql .= " INNER JOIN {$table1} t1 ON t1.nid = n.nid AND t1.vid = n.vid";    $sql .= " INNER JOIN {$table2} t2 ON t2.nid = n.nid AND t2.vid = n.vid";  }  $sql .= " WHERE n.nid = %d";