<?php
$url = "https://libreapis.com/api/gpt4_post.php";
$data = [
    "messages" => [
        ["role" => "system", "content" => "You are a helpful assistant."],
        ["role" => "user", "content" => "Hello, give me an example reply."]
    ],
    "seed" => 101
];

$options = [
    'http' => [
        'header'  => "Content-Type: application/json\r\n",
        'method'  => 'POST',
        'content' => json_encode($data),
    ]
];
$context  = stream_context_create($options);
$result = file_get_contents($url, false, $context);

if ($result === FALSE) {
    echo "An error occurred!";
} else {
    header('Content-Type: application/json');
    echo $result;
}
?>