How can beginners improve their understanding of HTTP protocols when using PHP?

Beginners can improve their understanding of HTTP protocols when using PHP by studying the basics of HTTP requests and responses, learning about common status codes, headers, and methods, and practicing sending and receiving HTTP requests in their PHP code. They can also use tools like Postman or cURL to test their HTTP requests and responses.

// Example code snippet to send an HTTP GET request using PHP
$url = 'https://api.example.com/data';
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
curl_close($ch);

// Example code snippet to send an HTTP POST request using PHP
$url = 'https://api.example.com/data';
$data = array('key1' => 'value1', 'key2' => 'value2');
$ch = curl_init($url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$response = curl_exec($ch);
curl_close($ch);