//function declararion function name($firstName, $lastName = 'defaultvalue') { puts $firstName . ' ' . $lastName } //function call name('Mike', 'Taylor'); //function call with named parameters (PHP 8) name(firstName: 'Mike', lastName: 'Taylor'); // order can change //function variables params function name(...$params) { return $params[0] . “ “ . params[1]; } // Closure function Route::get('/', function () { return view('welcome'); }); // Arrow functions Route::get('/', fn () => view('welcome');

//class declaration class Person { } // object instantiation $person = new Person //class properties and constructor class Person { protected $firstName; protected $lastName; public function __construct($firstName, $lastName) { $this->firstName = $firstName; $this->lastName = $lastName } // Constructor Property Promotion (PHP 8) class Person { public function __construct(protected $firstName, protected $lastName) { } //static constructor public static function create(...$params) { return new self($params) } $person = Person::create(‘Mike’, ‘Taylor’); // class inheritance class Customer extends Person { public function name() { parent::name(); echo 'Override method'; } } // Static Method class greeting { public static function welcome() { echo "Hello World!"; } } // Call static method greeting::welcome(); // Static method internal call class greeting { public static function welcome() { echo "Hello World!"; } public function __construct() { self::welcome(); } } new greeting(); // Interface interface Animal { public function makeSound(); } class Cat implements Animal { public function makeSound() { echo "Meow"; } } $animal = new Cat(); $animal->makeSound(); //Trait (mix-in) trait HelloWorld { public function sayHello() { echo 'Hello World!'; } } class Greetings { use HelloWorld; } $object = new Greetings(); $object->sayHello();

php

Associative Arrays:
index.php

<?php 
$person = [
	'age' => 31,
	'hair' => 'brown,
	'career' => 'web developer'
];

$person['name'] = 'prasanth'; // add the value to the associative array

unset($person['hair']); // remove the value from the associative array

require(index.blade.php);
?>

index.blade.php

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <ul>
        <?php foreach ($person as $key => $value): ?>
        <li><strong><?= $key; ?></strong><?= $value; ?> </li>
        <?php endforeach; ?>
    </ul>
</body>
</html>

Functions:

<?php

function dd($data){
    echo "<pre>";
    die(var_dump($data));
    echo "</pre>";
}

?>

Classes:

class Task {
    protected $description;
    protected $completed = false;
    public function __construct($description){
        $this->description = $description;
    }
    public function isCompleted(){
        return $this->completed;
    }
}

$task = new Task('go to store');

var_dump($task->isCompleted());//bool(false)

another example:

index.php
<?php
class Task {
    public $description;
    protected $completed = false;
    public function __construct($description){
        $this->description = $description;
    }
    public function isCompleted(){
        return $this->completed;
    }

    public function complete(){
     $this->completed = true;
    }
}

$tasks = [
    new Task('go to store'),
    new Task('go to market'),
    new Task('read book')
];

$tasks[1]->complete();

//var_dump($tasks); //bool(false)
require 'index.blade.php';
?>

index.blade.php
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <ul>
        <?php foreach ($tasks as $task): ?>
            <?php if ($task->isCompleted()): ?>
                <strike><li><?= $task->description; ?></li></strike>
            <?php else: ?>
                <li><?= $task->description; ?></li>
            <?php endif; ?>
        <?php endforeach; ?>
    </ul>
</body>
</html>

output:

go to store
~~go to market~~
read book

php Routing

Request header

  GET /about HTTP/1.1
  Host: phpden.info

Response
```
HTTP/1.1 200 ok
```

prasanth22/Php_Tutorial.md

Functions:

Oops:

php

php Routing