The node object is loaded by the function load() of Node class of core Drupal system. The object of the node will hold the pieces of information like Content type, created timestamp, author and revision values. Similarly we able to access node field values. The below is the example accessing the Node properties field values of the node.
The Drupal we can able to add custom CSS files to our forms. In Drupal 8 adding custom, CSS files will be achieved by using the library to system. The library files are needed before adding to form. These libraries descriptions are added in MODULE_NAME.libraries.yml files. Once libraries added we can able to define in our forms.
The captcha will help to control bot and anonymous users content creation in websites. The captcha system makes will make a challenge for every user to confirm whether the user is human or not. These challenges are mainly used for avoiding spam content creations. In Drupal, there some contribute module will help to achieve captcha for Drupal sites.
In Drupal form alter help to alter the form content so we alter existing field, Add new fields and remove fields from existing form. The Drupal forms will support us to grouping the form fields. The below example demonstrate how to add or alter existing field into a group.
In English grammar, there is importance to display words with proper nouns. The Singular and Plural will help to display sentences with numeric count components. Singular means only one. Plural means more than one. In Drupal 8 we can format both singular and plural values by formatPlural() function of Transulation Modules.
The Hook system will provide alter any content from one function from another in Drupal. The Drupal 8 Hook implementation are invoked with help of Core Drupal class function of moduleHandler(). This function will provide the object to execute all hook functions to alter the content.
Rules are used for trigger any action based on some condition pass. The contribute module Rule is used to achieve this features. We can able to programatically create and update rule action and conditons. The function rules_config_load() helps to load rule object by its name. The rule object will return attributes of particular rule. Using the object of rule we can able to edit its values.
In Drupal commerce will help to convert any numbers into a proper currency format. The function commerce_currency_format() helps to convert decimal numbers to particular country formatted currency. This function will accept a decimal number and country currency code for change given number into currency.
The MySQL database query supports aggregate functions to retrieve values from the database. In our custom query, we can able to add aggregate queries. The function addExpression() takes object of database query to aggregate results in db_select(). The below example will demonstrate the usage of aggregate functions.
The MySQL is the database which stores any type of data in Database. Using the MySQL we can able to store date-related fields. The MySQL will support Date functions to retrieve and format database date field values. In Drupal also we can able to add date functions in our queries with help of where() function in the database object. The below is the syntax and example of usage of the where() function.
Drupal system makes blocks is cachable to speed render. The block cache is stored in Drupal core database block_cache table. By altering or change information of block as non-cachable. This is achieved by passing cache as "DRUPAL_NO_CACHE" in hook_block_info() for custom block and hook_block_info_alter() in existing block.
Blocks are the data or content holders in Drupal. We can able place block in any region of our Drupal site. The main advantage of the block is can place any pages. We can able to create custom blocks via Configuration and coding wise. The below is the steps to create custom blocks in Drupal 7.
The Contribute module "Date" will help to create date field in Drupal system. This date is stored in UTC format in the database. We can render default date format from any type into user specified timezone. The below example code demonstrate how to render dates.
In Drupal, each and every entity will different fields. These Fields are stored as the seprate table in Drupal system. Based on the field type(Text field, Body field, Integer, File upload field, entity reference field) the render display format can change. While rendering field value in our custom code need to concentrate on the field display format. The function drupal_render() with field_view_field() we can output formated values.
The Drupal will support different type timezone to process date related data. But actual data are stored in Unix time stamp format of UTC in the database. The Drupal default core system will process dates as configured in system configuration. While we accessing database date values we need to format to particular timezone date.
The Meta tags will hold the information about the pages. We can programmatically able to add meta tags into Drupal pages. The function "drupal_add_html_head()" help to add meta tags. Below syntax and example show how to use this function.
In Drupal commerce, we can able to add new Commerce Products programmatically using the commerce_product_new() function. This will create an object of Commerce product, Using the object we can able to set their attributes for the product. The below is the example and syntax for creating the commerce product.
There are several chances by accident we will forget administrator password for the Administrator. The newer version of Drupal core comes with the salt algorithm to encrypt the password. To update the new password we need to encrypt them before an update. The below is the example and syntax for update password. Add the below code in index.php above menu_active_handler().
The Lineitem will represent the commerce products. So using this line item ID we can able to load the product details. The Below syntax and example will show the loading commerce product from Line Items id.
The Line Items in Drupal commerce used to refer the product in Order. Using the Line Item id we can able to load order details. The function commerce_line_item_load() will contains respective order ID of the order. We can able to get the order details from order ID using the function commerce_order_load().