Simple Git deply ( from http://f6design.com/journal/2013/11/19/automated-git-deployments-from-bitbucket/ )

deploy.php

<?php
$repo_dir = '/var/www/';

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

$branch = '';
//$update = false;
$update = true;

/*
// 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 = $commit->branch;
                if ($branch === 'production' || isset($commit->branches) && in_array('production', $commit->branches)) {
                        $update = true;
                        break;
                }
        }
}
*/

function addlog($log)
{
        file_put_contents('deploy.txt', $log, FILE_APPEND);
}

function run($command)
{
        $output = '';
        exec($command, $output);
        addlog("[" . date('m/d/Y h:i:s a') . "] " . "$command\n");
        if (count($output)) {
                addlog("\t" . implode("\n\t", $output) ."\n");
        }
}

if ($update) {
        // Do a git checkout to the web root
        run('cd ' . $repo_dir . ' && ' . $git_bin_path  . ' fetch');
        run('cd ' . $repo_dir . ' ' . $git_bin_path  . ' checkout -f');
        run('cd ' . $repo_dir . ' && composer install');
        run('cd ' . $repo_dir . ' && php artisan migrate');

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