BitBucket Webhook for Hipster Pixel, full details available at https://hipsterpixel.co/2016/01/27/my-blog-publishing-workflow-on-ios-part-1-tutorial

bitbucket-webhook-script.php

if( $key != 'aRandomKeyThatMakesItPrivate' ) {
	return '404';
}

// The dir where the Git repo will live on your server
$repo_dir = '/home/username/webapps/website_git/';

// Full path to git binary is required if git is not in your PHP user's path. Otherwise just use 'git'.
$git_bin_path = '/usr/bin/git';

$update = false;

// Parse data from Bitbucket hook payload
$payload = json_decode($_POST['payload']);

if (empty($payload->commits)){
// When merging and pushing to   bitbucket, the commits array will be empty.
// In this case there is no way to know what branch was pushed to, so we will do an update.
$update = true;

} else {
	foreach ($payload->commits as $commit) {
		$branch = $commit->branch;
		if($debug) print("Commit branch = $branch\n");
			if ($branch === 'production' || isset($commit->branches) && in_array('production', $commit->branches)) {
				$update = true;
				break;
			}
		}
	}

	if ($update) {

	  // Do a git checkout to the web root
	  exec('cd ' . $repo_dir . ' && ' . $git_bin_path  . ' pull');

	  // Log the deployment
	  $commit_hash = shell_exec('cd ' . $repo_dir . ' && ' . $git_bin_path  . ' rev-parse --short HEAD');
	  file_put_contents('deploy.log', date('m/d/Y h:i:s a') . " Deployed branch: " .  $branch . " Commit: " . $commit_hash . "\n", FILE_APPEND);
	}

	return;