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Quotes S
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- 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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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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- 13 Modern Php 8
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Composer S
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Slim Framework
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- 14 Create Framework 7
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App
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Http Foundation
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- 15 Frameworks 4
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Symfony v5
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- 16 Composer 5
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Guzzle
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- 17 Symfony 6
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Routes S
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Doctrine
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Templating
S
R
Q
Typed
PHP 7.4 finally brings typed properties.
declare(strict_types=1);
/**
* Prior to PHP 7.4 ...
*
* Using strict data would have required ...
* to enforce the data integrity.
*
* setBirthDate(DateTime $birthday): void
* getBirthDate(): \DateTime
* To mark property can be null, ...
* prefix its type with a question mark
*/
class A
{
public DateTime $day; // Look Here
public function set($day) : void
{
$this->day = $day;
}
public function get() : String
{
return $this->day->format('d-m-Y');
}
}
class B
{
public ?String $day; // Can be null
public function __construct() {}
}
$a = new A();
$b = new B();
$a->set(new DateTime('2011-12-01'));
var_dump($a->get() == '01-12-2011'); // true
try {
$a->day = null;
$b->day = null;
} catch(TypeError $e) {
echo $e->getMessage(); // Cannot assign null A::day
}
Arrow
Arrow functions are a way of writing shorter functions.
/**
* Arrow functions, less verbose code
*/
$data = [
(object) ['id' => 1, 'name' => 'John'],
(object) ['id' => 2, 'name' => 'Mark'],
];
$A = array_map(fn($v) => $v->id, $data); // PHP > 7.4+
$B = array_map(function ($v) { // PHP < 7.4
return $v->id;
}, $data);
print_r($A); // 1, 2
print_r($B); // 1, 2
➥ Questions