6 uses of REQUIREMENT_INFO in Drupal 7

file_requirements in modules/file/file.install

Implements hook_requirements().

hook_requirements in modules/system/system.api.php

Check installation requirements and do status reporting.

system_requirements in modules/system/system.install

Implements hook_requirements().

UpdateScriptFunctionalTest::testRequirements in modules/system/system.test

Tests that requirements warnings and errors are correctly displayed.

update_script_test_requirements in modules/simpletest/tests/update_script_test.install

Implements hook_requirements().

_system_check_db_utf8mb4_requirements in modules/system/system.install

Checks whether the requirements for multi-byte UTF-8 support are met.