wp-config.php

if ($_SERVER['REMOTE_ADDR']=='127.0.0.1') {
    define('WP_ENV', 'local');
} elseif ($_SERVER['HTTP_HOST']=='develop.project.com') {
    define('WP_ENV', 'develop');
} elseif ($_SERVER['HTTP_HOST']=='master.project.com') {
    define('WP_ENV', 'develop');
} else {
    define('WP_ENV', 'production');
}

$server  = preg_replace ('/:.*/',"", $_SERVER['HTTP_HOST']);

if ( WP_ENV == 'develop' ) {
    define('DB_NAME', 'project_dev');
    define('DB_USER', '');
    define('DB_PASSWORD', '');
    define('DB_HOST', 'localhost');
    define('WP_SITEURL', "http://$server");
    define('WP_HOME', "http://$server");
    define('DISALLOW_FILE_MODS',true);
} elseif ( WP_ENV == 'production' ) {
    define('DB_NAME', 'project_live');
    define('DB_USER', '');
    define('DB_PASSWORD', '');
    define('DB_HOST', 'localhost');
    define('DISALLOW_FILE_MODS',true);
} elseif ( WP_ENV == 'local' ) {
    define('WP_SITEURL', "http://$server");
    define('WP_HOME', "http://$server");
    define('DB_NAME', 'project_dev');
    define('DB_USER', '');
    define('DB_PASSWORD', '');
    define('DB_HOST', 'localhost');
}