push.php

<?php
ini_set("log_errors", 1);
ini_set("error_log", "php.log");
error_reporting(E_ALL);

$postdata = file_get_contents("php://input");

try{
        if ( $postdata ){
                if( $hookArray = json_decode( $postdata ) ){
                        $splitRef= preg_split("/[\/]+/", $hookArray->ref);
                        if( ( $branch = escapeshellarg(array_pop( $splitRef )) ) != "heads" ){
                                ob_start();
                                var_dump($postdata);
                                var_dump($branch);
                                $result = ob_get_clean();
                                file_put_contents('header_content.txt', $result);
                                exec("sudo -u puppet /usr/local/bin/r10k deploy environment $branch -p 2> /var/www/html/shell.log &");
                        }
                        else {
                                throw new Exception("branch variable is not set or equals to 'heads'");
                        }
                }
                else
                {
                        throw new Exception("An error was encountered while attempting to json_decode the \$postdata");
                }
        }
        else{
                throw new Exception("HTTP_RAW_POST_DATA is not set or 'ref' is not a valid array element");
        }

} catch (Exception $e) {
        error_log( sprintf( "%s >> %s", date('Y-m-d H:i:s'), $e ) );
}
?>