<?php
/**
 * WhatsApp Channel Auto Post via Evolution API
 * Server IP: 153.75.245.214
 */

function sendWhatsAppChannelPost($channelJid, $message, $imageUrl = null) {
    $apiUrl = "https://wp.tahmid.pw";
    $apiKey = "WA_AUTO_POST_SECRET_2026_KEY";
    $instance = "channel_bot";

    if (!empty($imageUrl)) {
        // Send Image with Caption
        $endpoint = "{$apiUrl}/message/sendMedia/{$instance}";
        $payload = [
            "number"    => $channelJid,
            "mediatype" => "image",
            "media"     => $imageUrl,
            "caption"   => $message
        ];
    } else {
        // Send Text Only
        $endpoint = "{$apiUrl}/message/sendText/{$instance}";
        $payload = [
            "number" => $channelJid,
            "text"   => $message
        ];
    }

    $ch = curl_init($endpoint);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($payload));
    curl_setopt($ch, CURLOPT_HTTPHEADER, [
        "Content-Type: application/json",
        "apikey: {$apiKey}"
    ]);
    curl_setopt($ch, CURLOPT_TIMEOUT, 30);

    $response = curl_exec($ch);
    $error = curl_error($ch);
    curl_close($ch);

    return $error ? json_encode(["error" => $error]) : $response;
}

// ব্যবহার করার উদাহরণ:
$myChannel = "120363206822480233@newsletter"; // আপনার চ্যানেলের JID
$postText  = "নতুন ক্যাম্পেইন অফার!
আজই অর্ডার করুন।";

$result = sendWhatsAppChannelPost($myChannel, $postText);
echo $result;
?>