CRUD Operations in PHP PDO with Exception Management with examples CRUD stands for Create, Read, Update, and Delete. These are the basic operations used to interact with a database. Create (Insert): - Inserts new data into the database Syntax: INSERT INTO table_name (column1, column2, ...) VALUES (value1, value2, ...); Example: $sql = "INSERT INTO users...

Exceptional handling and try catch in php with syntax and examples Exception handling is a mechanism to handle runtime errors in a controlled manner. PHP provides try-catch blocks to handle exceptions. Syntax: try { // code that may throw an exception } catch (ExceptionType $e) { // code to handle the exception } Example: try...

Traits and namespaces in php with syntax and examples Traits are reusable blocks of code that can be used in multiple classes. They help reduce code duplication and promote code reuse. Syntax: trait TraitName { public function method1() { // code } public function method2() { // code } } class ClassName { use TraitName;...

Interface and Abstract classes in php with syntax and examples Interfaces define a contract that must be implemented by any class that implements it. They cannot be instantiated and only contain method declarations. Syntax: interface InterfaceName { public function method1(); public function method2(); } Example: interface Printable { public function print(); } class Document implements...

Static Methods in PHP with syntax and examples Inheritance in php Static methods belong to a class, not instances. They can be called without creating an object. Syntax: class ClassName { public static function staticMethod() { // code } } Example: class Math { public static function add($a, $b) { return $a + $b; }...

Classes and Objects in PHP with syntax and examples Classes are templates for creating objects, encapsulating data and behavior. Objects are instances of classes, representing real-world entities. Class Syntax: class ClassName { // properties public $property1; protected $property2; private $property3; // constructor public function __construct($arg1, $arg2) { $this->property1 = $arg1; $this->property2 = $arg2; } //...

Cookies in php with syntax and examples ookies are small text files stored on a client's device, allowing you to track user data and preferences across multiple requests. Setting Cookies: Syntax: setcookie(name, value, expire, path, domain, secure, httponly) Example: setcookie('username', 'JohnDoe', time() + 86400, '/', '', '', true); Retrieving Cookies: Syntax: $_COOKIE['name'] Example: echo $_COOKIE['username'];...

Upload file in php with syntax and examples PHP allows you to upload files from a client's device to your server using the $_FILES superglobal array. File Upload Syntax: 1. $_FILES['file']['name']: File name 2. $_FILES['file']['type']: File type (MIME) 3. $_FILES['file']['tmp_name']: Temporary file path 4. $_FILES['file']['size']: File size (bytes) 5. $_FILES['file']['error']: Error code (0 = no...

Sessions in php with syntax and examples Sessions allow you to store and retrieve data across multiple requests, enabling you to maintain user-specific information and create personalized experiences. Session Syntax: 1. session_start(): Initializes a session. 2. $_SESSION['key'] = value: Sets a session variable. 3. $_SESSION['key']: Retrieves a session variable. 4. unset($_SESSION['key']): Deletes a session variable....

Include and Required in php with syntax and examples Include and require are used to insert the contents of one PHP file into another. This allows for reusable code, easier maintenance, and organization. Include: Syntax: include 'filename.php'; Example: // header.php echo "Header Content"; // index.php include 'header.php'; echo "Main Content"; Require: Syntax: require 'filename.php'; Example:...