why we use curl in php code example

Example 1: php curl

// set post fields
$post = [
    'username' => 'user1',
    'password' => 'passuser1',
    'gender'   => 1,
];

$ch = curl_init('http://www.example.com');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post);

// execute!
$response = curl_exec($ch);

// close the connection, release resources used
curl_close($ch);

// do anything you want with your response
var_dump($response);

Example 2: php curl get

PHP cURL GET Request
A GET request retrieves data from a server. This can be a website’s HTML, an API response or other resources.

<?php

$cURLConnection = curl_init();

curl_setopt($cURLConnection, CURLOPT_URL, 'https://hostname.tld/phone-list');
curl_setopt($cURLConnection, CURLOPT_RETURNTRANSFER, true);

$phoneList = curl_exec($cURLConnection);
curl_close($cURLConnection);

$jsonArrayResponse - json_decode($phoneList);