Php
/
Basics
- 1 Basics 5
-
Quotes S
-
Constants S
-
Control structures S
-
Reference S
-
Number systems S
- 2 Variables 4
-
Definition S
-
Variable variable S
-
Exists S
-
Type casting S
- 3 Operators 5
-
Aritmetic S
-
Bitwise S
-
String S
-
Comparison S
-
Logical S
- 4 Function 4
-
Definition S
-
Anonymous S
-
Reference S
-
Variable arguments S
- 5 Array 7
-
Basics S
-
Operations S
-
Create S
-
Search S
-
Modify S
-
Sort S
-
Storage S
- 6 String 9
-
Basics
-
Compare
-
Search
-
Replace
-
Format
-
Regexp
-
Parse
-
Formating
-
Json
- 7 Streams 6
-
File open
-
Read file
-
Read csv
-
File contents
-
Context
-
Ob_start
- 8 Oop 6
-
Object instantiation S
-
Class constructor
-
Interfaces, abstract
-
Resource visibility
-
Class constants
-
Namespaces
- 9 Features 9
-
Autoload
-
Class reflection
-
Magic methods
-
Exceptions S
-
Late static binding
-
Type hinting
-
SPL
-
PHPUNIT
-
PHAR
- 10 Versions 2
-
Php7.4 S
-
Php8.0 S
- 11 Http 4
-
Headers
-
File Uploads
-
Cookies
-
Sessions
- 12 Design Patterns 4
-
Singleton Pattern S
-
Observer Pattern
-
Strategy Pattern
-
Registry
- 13 Modern Php 8
-
Composer S
-
Slim Framework
-
Autoloader
-
Package
-
Releases
-
Generators
-
Dependency Injection
-
Middleware
- 14 Create Framework 7
-
App
-
Http Foundation
-
Front Controller
-
Routing
-
Render Controller
-
Resolver
-
SoC
- 15 Frameworks 4
-
Symfony v5
-
Laravel v8
-
Laminas v3
-
Codeigniter v4
- 16 Composer 5
-
Guzzle
-
Carbon
-
Faker
-
Math
-
Requests
- 17 Symfony 6
-
Routes S
-
Annotations
-
Flex
-
Controllers
-
Doctrine
-
Templating
S
R
Q
Php Basics Reference
Variables not passed by reference (& needed) Reference with foreach changes the array $a = 1; $y =& $a; $a = 2; $y == 2 // trueReference
Rererence
In PHP variables are NOT passed by reference (& needed)
/**
* Variable are passed by value (not by reference)
*/
$a = 1;
$x = $a;
$y =& $a; // Look Here
$a = 2;
var_dump($x == 1); // true
var_dump($x != 2); // true
var_dump($y == 2); // true
Array
Reference with foreach changes the array.
/**
* Reference with foreach changes the array
* Use it with care
*/
$A = [1, 2, 3, 4];
foreach ($A as &$val) { // Look Here
$val *= 2;
}
var_dump($A == [2, 4, 6, 8]); // true
var_dump($A != [1, 2, 3, 4]); // true
➥ Questions