Php
/
Basics
- 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
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R
Q
Php Basics Control Structures
Switch evaluates once, then compares Break parameter to exit nested loops for ($i ... ) for ($j ... ) break 2;Loops
Switch
Evaluates the initial expression only once, then compares it against the values.
$a = 2;
switch($a) {
case 1:
echo 'one';
break;
case 2:
echo 'two'; // two
break;
default:
}
Conditional
Conditional assigment operators are used to set a value depending on conditions.
/**
* Conditional assigment operators
*
* Ternary operator:
* is a shorthand for the if ... else statement.
*
* Null coalescing:
* is a shorthand for if does not exist or is NULL
*/
$a = 1;
echo $a == 1 ? 1 : 2; // 1
echo !empty($b) ? $b : 2; // 2
echo $b ?? 2; // 2
While
With do / while the contents of the loop will be executed at least once.
/**
* Even if the condition never evaluates to true ...
* the content of the do / while is executed at least once.
*/
$i = 0;
$k = 0;
do {
echo $i = $i + 1; // 1
} while ($i < 0);
while ($k < 0) {
echo $k = $k + 1; // nothing
}
Break
It takes an optional parameter, which allows you to exit from multiple nested loops.
for ($i=0; $i<=10; $i++) {
for ($j=0; $j<=10; $j++) {
if ($j == 5) break 2; // Exist this loop and the next one
echo $i; // 00000
}
}
➥ Questions