7 uses of DRUPAL_MINIMUM_PHP

hook_requirements in modules/system/system.api.php
Check installation requirements and do status reporting.
install_profile_info in includes/install.inc
Retrieves information about an installation profile from its .info file.
system_requirements in modules/system/system.install
Implements hook_requirements().
update_fix_d7_install_profile in includes/update.inc
Register the currently installed profile in the system table.
update_prepare_d7_bootstrap in includes/update.inc
Performs extra steps required to bootstrap when using a Drupal 6 database.
_system_rebuild_module_data in modules/system/system.module
Helper function to scan and collect module .info data.
_system_rebuild_theme_data in modules/system/system.module
Helper function to scan and collect theme .info data and their engines.

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