List of top Drupal Hosting providers, Drupal Web Hosting Reviews, prices and features. All hosts support PHP 5 and MySQL 5.
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Drupal Hosting
Drupal content management script requires web server (apache httpd is preferred) with PHP and MySQL (version 4.1 and up) or PostgreSQL (7.4 and higher) database support. For PHP version at least 4.3.5 is required, PHP 5.2.x is recommended. Register_globals PHP setting needs to be turned off in order to be installed. I personally have tested Drupal cms with above hosts and it run without any problems. The hosts support custom PHP.ini settings for customizing specific PHP settings(register_globals for example).