simple discord webhook for MAC

<?php
    header('Content-Type: text/html; charset=UTF-8');

    file_put_contents("post.log",print_r($_POST,true));

    $banreas = $_POST["banreas"];
    $steamid = $_POST["steamid"];
    $playeradr = $_POST["playeradr"];
    $playerdata = $_POST["playerbandata"];
    $webhook = $_POST["webhook"];

    if (!$webhook)
        exit("Only post requests!");

    function postToDiscord($message,$webhook)
    {
        $data = array("content" => $message, "username" => "Modern AC");
        $curl = curl_init($webhook);
        curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "POST");
        curl_setopt($curl, CURLOPT_POSTFIELDS, json_encode($data));
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
        return curl_exec($curl);
    }

    if (strpos( $banreas, "verified" ) != true) {
$message = "```".$banreas."
SteamID: ".$steamid."
IP-Address: ".$playeradr."
Additional data: ".$playerdata."```";

        postToDiscord($message,$webhook);
    }
?>