Learn from your fellow PHP developers with our PHP blogs, or help share the knowledge you've gained by writing your own.
Nomad PHPclass CreateProductCommand {
public $name;
public $price;
}
class GetProductQuery {
public $productId;
}
class CreateProductCommandHandler {
public function handle(CreateProductCommand $command) {
}
}
class GetProductQueryHandler {
public function handle(GetProductQuery $query) {
}
}
class Product {
public $name;
public $price;
}
class ProductView {
public $name;
public $price;
}
$command = new CreateProductCommand();
$command->name = "Example Product";
$command->price = 99.99;
$handler = new CreateProductCommandHandler();
$handler->handle($command);
$query = new GetProductQuery();
$query->productId = 123;
$handler = new GetProductQueryHandler();
$product = $handler->handle($query);
<?php
$encryptionKey = openssl_random_pseudo_bytes(32);
$plaintext = "Sensitive data to encrypt";
$ciphertext = openssl_encrypt($plaintext, 'aes-256-cbc', $encryptionKey, 0, $iv);
$decryptedText = openssl_decrypt($ciphertext, 'aes-256-cbc', $encryptionKey, 0, $iv);
echo $decryptedText;
?>
<?php
$config = array(
"digest_alg" => "sha512",
"private_key_bits" => 4096,
"private_key_type" => OPENSSL_KEYTYPE_RSA,
);
$keyPair = openssl_pkey_new($config);
openssl_pkey_export($keyPair, $privateKey);
$publicKey = openssl_pkey_get_details($keyPair)["key"];
$plaintext = "Confidential message";
openssl_public_encrypt($plaintext, $encrypted, $publicKey);
openssl_private_decrypt($encrypted, $decrypted, $privateKey);
echo $decrypted;
?>
Ctrl + Alt + T to open the terminal.Alt + F2, type konsole, and press Enter.cd (Change Directory): Use cd followed by the name of the directory to navigate to that directory. For example: cd Documents ls (List Files): Use ls to list the files and directories in the current directory. ls pwd (Print Working Directory): Use pwd to display the full path of the current directory. pwd mkdir (Make Directory): Use mkdir followed by the name of the directory to create a new directory. mkdir my_directory touch: Use touch followed by the name of the file to create a new empty file. touch my_file.txt cp (Copy): Use cp followed by the source file and destination to copy files. cp source_file.txt destination_directory/ mv (Move/Rename): Use mv followed by the source and destination to move or rename files. mv old_name.txt new_name.txt rm (Remove): Use rm followed by the file name to delete files. Be careful as this action is irreversible. rm unwanted_file.txt cat (Concatenate): Use cat followed by the file name to display the contents of a file. cat my_file.txt nano or vim (Text Editors): Use nano or vim followed by the file name to edit a file in the terminal. nano my_file.txt grep (Global Regular Expression Print): Use grep followed by a search term and file name to search for a specific pattern in a file. grep "pattern" my_file.txt uname (Unix Name): Use uname to display system information. uname -a df (Disk Free): Use df to display disk space usage. df -h top or htop (Process Monitoring): Use top or htop to display real-time system resource usage. top 
composer require --dev phpunit/phpunit
tests in your project root, and within that directory, create a file named ExampleTest.php. Here's an example of what your test file might look like:<?php
use PHPUnit\Framework\TestCase;
class ExampleTest extends TestCase
{
public function testTrueAssertsToTrue()
{
$this->assertTrue(true);
}
}
testTrueAssertsToTrue, which asserts that true is indeed true. vendor/bin/phpunit tests
sudo apt-get install mariadb-server.CREATE DATABASE my_database;
USE my_database;
CREATE TABLE users (
id INT AUTO_INCREMENT PRIMARY KEY,
username VARCHAR(50) NOT NULL,
email VARCHAR(100) NOT NULL
);
my_database and a table named users with columns for id, username, and email.INSERT INTO users (username, email) VALUES ('john_doe', '[email protected]');
SELECT * FROM users;
UPDATE users SET email = '[email protected]' WHERE username = 'john_doe';
DELETE FROM users WHERE username = 'john_doe';
g10dra 140,532 
mike 96,377 
crocodile2u 93,879 
harikrishnanr 73,457 
calevans 57,468 
christiemarie 47,491 
MindNovae 43,332 
dmamontov 39,092 
HowTos 22,519 
tanja SPONSORS
SPONSORS
