drupal 模块开发代码

<?php
/**
 * Implements hook_help.
 *
 * Displays help and module information.
 *
 * @param path
 *   Which path of the site we're using to display help
 * @param arg
 *   Array that holds the current path as returned from arg() function
 */


function current_posts_help($path,$arg){
    switch ($path) {
        case 'admin/help#current_posts':
            return '' . t("Display links on today") . '';
        case 'admin/config/adminstration/current_posts':
            return '' . t("testsaaaaaaa") . '';
            #break;
    }
}

/**
 * Implements hook_block_info().
 */

function current_posts_block_info(){
    $blocks['current_posts'] = array(
            'info' => t("current posts"),
            'cache' => DRUPAL_CACHE_PRE_ROLE,
            );
    return $blocks;

}


/**
 * Implements hook_block_view().
 *
 * Prepares the contents of the block.
 */
function current_posts_block_view($delta = '') {
  switch($delta){
    case 'current_posts':
      $block['subject'] = t('Current posts');
      if(user_access('access content')){
        //Use our custom function to retrieve data.
        $result = array(1,2,3,4);
        #$result = current_posts_contents();
        //Array to contain items for the block to render.
        $items = array();
        //Iterate over the resultset and format as links.
        foreach ($result as $node){
          $items[] = array(
            'data' => l($node->title, 'node/' . $node->nid),
          );
        }

        if (empty($items)) { //No content in the last week.
          $block['content'] = t('No posts available.');
        }
        else {
          //Pass data through theme function.
          $block['content'] = theme('item_list', array(
            'items' => $items));
        }
      }
  }
  return $block;
}


/**
* Implements hook_menu().
*/
function current_posts_menu() {
  $items = array();

  $items['admin/config/content/current_posts'] = array(
    'title' => 'Current posts',
    'description' => 'Configuration for Current posts module',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('current_posts_form'),
    'access arguments' => array('access administration pages'),
    'type' => MENU_NORMAL_ITEM,
  );
 $items['current_posts'] = array(
    'title' => 'Current posts',
    'page callback' => '_current_posts_page',
    'access arguments' => array('access current_posts content'),
    'type' => MENU_NORMAL_ITEM, //Will appear in Navigation menu.
  );
  return $items;
}

/**
 * Page callback: Current posts settings
 *
 * @see current_posts_menu()
 */
function current_posts_form($form, &$form_state) {
  $form['current_posts_max'] = array(
    '#type' => 'textfield',
    '#title' => t('Maximum number of posts'),
    '#default_value' => variable_get('current_posts_max', 3),
    '#size' => 2,
    '#maxlength' => 2,
    '#description' => t('The maximum number of links to display in the block.'),
    '#required' => TRUE,
  );

  return system_settings_form($form);
}

/**
* Implements validation from the Form API.
*
* @param $form
*   A structured array containing the elements and properties of the form.
* @param $form_state
*   An array that stores information about the form's current state
*   during processing.
*/
function current_posts_form_validate($form, &$form_state){
  $max_num = $form_state['values']['current_posts_max'];
  if (!ctype_digit($max_num)){
    form_set_error('current_posts_max', t('You must enter a number for the maximum number of posts to display.'));
  }
}




/**
* Implements hook_permission().
*/
function current_posts_permission(){
  return array(
    'access current_posts content' => array(
      'title' => t('Access content for the Current posts module'),
    )
  );
}



?>