Create page without header and footer in Drupal 7

    This blog describes about create only page contents without header and footer in Drupal 7. All of you know almost all of the pages in Drupal have header and footer. Suppose you want to create a page without header and footer in Drupal 7. Is it possible? Yes, it is possible in Drupal 7. You can create a page without header and footer using 'delivery callback' in hook_menu.

Render a page without header and footer in Drupal 7:

     Drupal provide a option to create page without header and footer. Let see the below code for render a page without header and footer in Drupal 7.

/**
 * Implement hook_menu().
 */
function phponwebsites_menu() {
  $items['sample-wo-header-footer'] = array(
    'title' => 'A page without header and footer in Drupal 7',
    'access callback' => TRUE,
    'page callback' => 'phponwebsites_without_header_footer',
    'type' => MENU_CALLBACK,
    'delivery callback' => 'deliver_plain',
  );
  return $items;
}

function deliver_plain($page_callback_result) {
  print $page_callback_result;
}

/**
 * Implement phponwebsites_without_header_footer().
 */
function phponwebsites_without_header_footer() {
  return 'This is the page without header and footer';
}

   You could see the page without any header and footer when you view page in a browser. Now I've hope you how to render a page without header and footer in Drupal 7.

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Clear views cache when insert, update and delete a node in Drupal 7

This blog describes how to clear views cache while inserting, updating and deleting a node in Drupal 7. If we want to improve site performance, then views caching is one of the options.

   For example, you have views which display list of records. It will update occasionally. Then we can render views data from cache rather than server if we set cache for views. We can set views cache at its settings page. Suppose you have cached views for 5 mins. Then it didn't display updated data until 5 mins even if new node is added to that views. It displays updated data only after 5 mins because the views is cached for 5 mins. In that situation, the user can't view new data in cached views. So we need to clear views cache when add , update and delete a node. So only we can see new data in views and also data is rendered from cache.

Clear views cache when insert a new node in Drupal 7:

   The newly added node has not been displayed in views list if the cache is applied to a views. So we need to clear views cache when insert a new node using hook_node_insert(). Lets see the code for clear views cache while inserting a node:

 <?php
 /**
  * Imeplement hook_node_insert().
  */
 function phponwebsites_node_insert($node) {
   if ($node->type == 'tasks') {
     //clear views cache
     $viewsname = 'activity';
     cache_clear_all($viewsname, 'cache_views_data', TRUE);
   }
 }

Clear views cache when update a node in Drupal 7:

   When you tried to update a node, the updated data in that node has not been displayed in views. So we need to clear views cache when update a node using hook_node_update(). Lets see the code for clear views cache while updating a node:

 <?php
 /**
  * Imeplement hook_node_update().
  */
 function phponwebsites_node_update($node) {
   if ($node->type == 'article') {
     //clear views cache
     $viewsname = 'articles';
     cache_clear_all($viewsname, 'cache_views_data', TRUE);
   }
 }

Clear views cache when delete a node in Drupal 7:

   After delete a node, you could see the deleted node is displayed in the views. So we need to clear views when delete a node using hook_node_delete(). Lets see the code for clear views cache while deleting a node:

 <?php
 /**
  * Imeplement hook_node_delete().
  */
 function phponwebsites_node_delete($node) {
   if ($node->type == 'article') {
     //clear views cache
     $viewsname = 'articles';
     cache_clear_all($viewsname, 'cache_views_data', TRUE);
   }
 }

   You can see the performance of views page will be increased and you can see changes in your views. Now I've hope you know how to clear views cache when insert, update and delete a node in Drupal 7.

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Login using email and username in Drupal 7

   This blog describes about how to login using both email and username in Drupal 7. All of you know we could login using only username in Drupal 7.

       I've tried to login using email without any contrib modules. Finally i got the code. First alter form to add custom form validation. In custom form validation, get the name from user table by email and set that value into name field in form.  Let see the code:

<?php
/**
 * Implement hook_form_alter().
 */
function phponwebsites_form_alter(&$form, &$form_state, $form_id) {

  if ($form_id == "user_login" || $form_id == "user_login_block") {
    $form['name']['#title'] = t('Username or E-mail Address');
    // Ensure a valid validate array.
    $form['#validate'] = is_array($form['#validate']) ? $form['#validate'] : array();
    // login using username or email address
    array_unshift($form['#validate'],'phponwebsites_user_login_validate');
  }
}

 /**
 * Implement phponwebsites_user_login_validate()
 *
 * Return name by its email address
 */
function phponwebsites_user_login_validate($form, &$form_state) {
  if (isset($form_state['values']['name']) && strpos($form_state['values']['name'], '@') !== false) {
      $name = db_query("SELECT name FROM {users} WHERE LOWER(mail) = LOWER(:name)", array(':name' => $form_state['values']['name']))->fetchField();
    }
  if (isset($name)) {
    form_set_value($form['name'], $name, $form_state);
  }
}

   Now you can login using both username and email. I've hope you know how to login using both username and email in Drupal 7.

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Drupal 7 – Hide Promoted to front page & Sticky at top of lists options

    This blog describes how to hide "Promoted to front page" and "Sticky at top of lists" options from node form in drupal 7. When adding or editing a node, you can see "Publishing options" at bottom of the page which contains 'Published', 'Promoted to front page' and 'Sticky at top of lists' checkbox options. It should look like below image:

       The "Published" option is used to publish the content. The "Promoted to front page" option is used to display content in the front page. The 'Sticky at top of lists' option is used to keep the content sticked to the top of front page. If you don't want to show "Promoted to front page" and "Sticky at top of lists" options, then you can hide those options using hook_form_alter(), hook_form_FORM_ID_alter() and hook_form_BASE_FORM_ID_alter().

Hide Promoted to front page & Sticky at top of lists options in single node form:

       If you want to hide "Promoted to front page" and "Sticky at top of lists" options only in single node form, then you can remove those options from node form using either hook_form_alter() or hook_form_FORM_ID_alter() in drupal 7.  For example, we go to hide those options from article node form.

/**
 * Implement hook_form_alter().
 */
function phponwebsites_form_alter(&$form, &$form_state, $form_id) {
  // to hide promoted to front page option
  if (isset($form['options']['promote'])) {
    $form['options']['promote']['#access'] = FALSE;
  }

  // to hide sticky at top of lists option
  if (isset($form['options']['sticky'])) {
    $form['options']['sticky']['#access'] = FALSE;
  }
}

     Now you go to article node form and check whether "Promoted to front page" and "Sticky at top of lists" options are hidden or not. You couldn’t see those options in article node form. It should look like below image:

Hide Promoted to front page & Sticky at top of lists options in multiple node forms:

     If you want to hide "Promoted to front page" and "Sticky at top of lists" options in all node forms, then you can remove those options using  hook_form_BASE_FORM_ID_alter() in drupal 7.

/**
 * Implement hook_form_BASE_FORM_ID_alter().
 */
function phponwebsites_form_node_form_alter(&$form, &$form_state, $form_id) {
  // to hide promoted to front page option
  if (isset($form['options']['promote'])) {
    $form['options']['promote']['#access'] = FALSE;
  }

  // to hide sticky at top of lists option
  if (isset($form['options']['sticky'])) {
    $form['options']['sticky']['#access'] = FALSE;
  }
}

     Now you could not see those options in all node forms. Now you know how to hide "Promoted to front page" and "Sticky at top of lists" options from node form in drupal 7.

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