Codeigniter 4 - Creating Models with Examples Creating a Basic Model - Create a new file in the app/Models directory. - Extend the CodeIgniter\Model class. - Define the table name and primary key. Example: namespace App\Models; use CodeIgniter\Model; class User extends Model { protected $table = 'users'; protected $primaryKey = 'id'; } Creating a Model...

Codeigniter 4 - Modeling Data and ORM (Object-Relational Mapping) with Example Modeling Data - In CodeIgniter 4, models are used to interact with the database. - Models can be used to perform CRUD (Create, Read, Update, Delete) operations. Creating a Model - Create a new file in the app/Models directory. - Extend the CodeIgniter\Model class....

Codeigniter 4 - InComing Request Class with Example Incoming Request Class - The Incoming Request class provides methods to retrieve information about the incoming request. - It can be accessed using the request() function. Retrieving Request Headers - Use the getHeader() method to retrieve a specific request header. Example: $header = request()->getHeader('Content-Type'); Retrieving Request Body...

Codeigniter 4 - Database Meta Data with Example Database Metadata - Database metadata refers to the data that describes the structure and organization of a database. - In CodeIgniter 4, you can use the db() function to retrieve metadata about your database. Listing Tables - Use the list_tables() method to retrieve a list of tables...

Codeigniter 4 - Method Chaining with Example Method Chaining - Method chaining is a technique used to call multiple methods on an object in a single statement. - In CodeIgniter 4, method chaining is used extensively in the Query Builder and other classes. Query Builder Method Chaining - Use method chaining to build complex queries....

Codeigniter 4 - Query builder - select, where, where_in, where_not_in, with and or, like, or_like, not_like, having, group by, insert, update, update_batch, delete in codeigniter 4 with examples SELECT - Use the select() method to specify the columns to retrieve. Example: $db->select('name, email')->from('my_table')->get(); WHERE - Use the where() method to filter data based on conditions....

Codeigniter 4 - Query Helper Methods with Example Query Helper Methods - The Query Helper provides a set of methods to assist with building and executing database queries. Minimum Query - Use the min() method to retrieve the minimum value of a column. Example: $db->min('age', 'my_table'); Maximum Query - Use the max() method to retrieve...

Codeigniter 4 - Query Builder class with Example Query Builder Basics - The Query Builder class provides a simple and intuitive way to build and execute database queries. - Use the db_connect() function to connect to a database and then use the query builder to execute queries. Example: $db = db_connect(); $db->table('my_table')->get(); Selecting Data -...

Codeigniter 4 - Connecting to Database with Example Connecting to a Database - Use the db_connect() function to connect to a database. Example: $db = db_connect(); Specifying the Database Group - Use the db_connect() function with the database group name to connect to a specific database. Example: $db = db_connect('my_group'); Specifying the Database Configuration -...

Codeigniter 4 - Setting Database with Example Configuring the Database - Open the app/Config/Database.php file and add your database settings. Example: public $default = [ 'DSN' => '', 'hostname' => 'localhost', 'username' => 'root', 'password' => '', 'database' => 'my_database', 'DBDriver' => 'MySQLi', 'DBPrefix' => '', 'pConnect' => false, 'DBDebug' => (ENVIRONMENT !== 'production'), 'cacheOn'...