7 uses of DRUPAL_MINIMUM_PHP in Drupal 7

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.