Php
/
OOP
- 1 Basics 5
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Quotes S
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Constants S
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Control structures S
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Reference S
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Number systems S
- 2 Variables 4
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Definition S
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Variable variable S
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Exists S
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Type casting S
- 3 Operators 5
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Aritmetic S
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Bitwise S
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String S
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Comparison S
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Logical S
- 4 Function 4
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Definition S
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Anonymous S
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Reference S
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Variable arguments S
- 5 Array 7
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Basics S
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Operations S
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Create S
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Search S
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Modify S
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Sort S
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Storage S
- 6 String 9
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Basics
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Compare
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Search
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Replace
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Format
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Regexp
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Parse
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Formating
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Json
- 7 Streams 6
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File open
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Read file
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Read csv
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File contents
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Context
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Ob_start
- 8 Oop 6
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Object instantiation S
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Class constructor
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Interfaces, abstract
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Resource visibility
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Class constants
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Namespaces
- 9 Features 9
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Autoload
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Class reflection
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Magic methods
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Exceptions S
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Late static binding
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Type hinting
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SPL
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PHPUNIT
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PHAR
- 10 Versions 2
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Php7.4 S
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Php8.0 S
- 11 Http 4
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Headers
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File Uploads
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Cookies
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Sessions
- 12 Design Patterns 4
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Singleton Pattern S
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Observer Pattern
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Strategy Pattern
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Registry
- 13 Modern Php 8
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Composer S
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Slim Framework
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Autoloader
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Package
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Releases
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Generators
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Dependency Injection
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Middleware
- 14 Create Framework 7
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App
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Http Foundation
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Front Controller
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Routing
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Render Controller
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Resolver
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SoC
- 15 Frameworks 4
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Symfony v5
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Laravel v8
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Laminas v3
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Codeigniter v4
- 16 Composer 5
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Guzzle
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Carbon
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Faker
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Math
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Requests
- 17 Symfony 6
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Routes S
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Annotations
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Flex
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Controllers
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Doctrine
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Templating
R
Q
Resource
Public - accesed from any scope Protected - from within the class and its descendants Private - from within the class only Final - from any scope, but cannot be overriden in descendants
code
class A
{
public $a;
protected $b;
private $c;
public $d = "Test"; // String
public $e = 1.23; // Numeric value
public $f = array (1, 2, 3);
}
$obj = new A();
$obj->a = 1;
$obj->c = 3; // Error: Cannot access private property
Final
Final visibility applies to methods and classes only. Final method cannot be overidden. Final class cannot be extended.
code
final class A
{
final $c = 0;
// Error: final modifier is allowed ...
// only for methods and classes
final public function sum($a, $b) {
return $a + $b;
}
}
Constructors
Constructors are normaly declared public. Constructors are private in patterns like Singleton. You can't initialize a variable by calling a function. That is done in constructor.
code
class A
{
public $a = init(); // Error: Invalid operations
public function init() {}
}
Static
Static methods or properties can be access only as part of a class itself. This allows true encapsulation and avoid naming conflicts. Accessing static with -> generates notice.
code
error_reporting(E_ALL);
class A
{
public static $to = "World";
public static function bar()
{
echo "Hello " . self::$to;
}
}
echo A::$to; // World
$obj = new A();
$obj->bar(); // Hello World
echo $obj->to; // Accessing static property A::$to as non static
➥ Questions
Last update: 516 days ago