Webhook receiver PHP script

webhook.php

<?php

// GitHub webhook secret (set this in your GitHub webhook settings)
$secret = "Y0UR-secret-text-here!";

// Get the payload
$payload = file_get_contents('php://input');

// Verify the signature
$signature = $_SERVER['HTTP_X_HUB_SIGNATURE'] ?? null;
if (!$signature) {
    exit("No signature provided");
}

$hash = "sha1=" . hash_hmac('sha1', $payload, $secret);
if (!hash_equals($hash, $signature)) {
    exit("Invalid signature");
}

// Parse the payload
$data = json_decode($payload, true);

// Check if it's a push event
if ($_SERVER['HTTP_X_GITHUB_EVENT'] == 'push') {
    $triggerFile = '/var/www/example.com/triggers/git_pull_trigger';

    // Try to create trigger file
    $result = file_put_contents($triggerFile, date('Y-m-d H:i:s'));
    if ($result === false) {
        exit("Failed to create trigger file");
    }

    echo "Webhook received and trigger file created";
} else {
    echo "Received non-push event";
}
?>