Here is a list of all documented class members with links to the class documentation for each member:

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• OAUTH_ROOT : flickr_client
• obfuscate_filepath() : enrol_flatfile_plugin
• object_init() : js_writer
• observe_course_completed() : core_competency\api
• observe_course_module_completion_updated() : core_competency\api
• oci_package_installed() : oci_native_moodle_database
• offsetExists() : question_attempt_iterator , question_attempt_step_iterator , question_attempt_steps_with_submitted_response_iterator
• offsetGet() : question_attempt_iterator , question_attempt_step_iterator , question_attempt_steps_with_submitted_response_iterator
• offsetSet() : question_attempt_iterator
• offsetUnset() : question_attempt_iterator
• old_help_icon() : core_renderer
• on_after_write_attempt() : lesson_page , lesson_page_type_essay
• on_assignment_end() : moodle1_mod_assignment_handler
• on_basiclti_end() : moodle1_mod_lti_handler
• on_book_chapters_end() : moodle1_mod_book_handler
• on_book_chapters_start() : moodle1_mod_book_handler
• on_book_end() : moodle1_mod_book_handler
• on_chat_end() : moodle1_mod_chat_handler
• on_choice_end() : moodle1_mod_choice_handler
• on_choice_options_end() : moodle1_mod_choice_handler
• on_choice_options_start() : moodle1_mod_choice_handler
• on_course_modules_end() : moodle1_course_outline_handler
• on_course_section_end() : moodle1_course_outline_handler
• on_course_sections_end() : moodle1_course_outline_handler
• on_data_end() : moodle1_mod_data_handler
• on_elements_end() : moodle1_workshopform_handler , moodle1_workshopform_numerrors_handler , moodle1_workshopform_rubric_handler
• on_elements_start() : moodle1_workshopform_handler , moodle1_workshopform_numerrors_handler , moodle1_workshopform_rubric_handler
• on_feedback_end() : moodle1_mod_feedback_handler
• on_forum_end() : moodle1_mod_forum_handler
• on_glossary_categories_end() : moodle1_mod_glossary_handler
• on_glossary_categories_start() : moodle1_mod_glossary_handler
• on_glossary_end() : moodle1_mod_glossary_handler
• on_gradebook_end() : moodle1_gradebook_handler
• on_gradebook_grade_item_grades_start() : moodle1_gradebook_handler
• on_gradebook_grade_outcomes_end() : moodle1_outcomes_handler
• on_gradebook_grade_outcomes_start() : moodle1_outcomes_handler
• on_gradebook_start() : moodle1_gradebook_handler
• on_info_details_end() : moodle1_info_handler
• on_info_details_mod_end() : moodle1_info_handler
• on_legacy_element_end() : moodle1_workshopform_handler
• on_legacy_resource_end() : moodle1_resource_successor_handler
• on_lesson_end() : moodle1_mod_lesson_handler
• on_question_categories_end() : moodle1_question_bank_handler
• on_question_categories_start() : moodle1_question_bank_handler
• on_question_category_end() : moodle1_question_bank_handler
• on_question_category_start() : moodle1_question_bank_handler
• on_questions_end() : moodle1_question_bank_handler
• on_quiz_end() : moodle1_mod_quiz_handler
• on_resource_end() : moodle1_mod_resource_handler
• on_roles_end() : moodle1_roles_definition_handler
• on_root_element_end() : moodle1_root_handler
• on_root_element_start() : moodle1_root_handler
• on_scales_start() : moodle1_scales_handler
• on_scorm_end() : moodle1_mod_scorm_handler
• on_survey_end() : moodle1_mod_survey_handler
• on_wiki_end() : moodle1_mod_wiki_handler
• on_workshop_element_end() : moodle1_mod_workshop_handler
• on_workshop_elements_end() : moodle1_mod_workshop_handler
• on_workshop_elements_start() : moodle1_mod_workshop_handler
• on_workshop_end() : moodle1_mod_workshop_handler
• one_sample_per_analysable() : core\analytics\analyser\courses , core\analytics\analyser\users , core_analytics\local\analyser\base
• onError() : enrol_lti\tool_provider
• onespace2empty() : oci_native_moodle_database
• ongoing_score() : mod_lesson_renderer
• onLaunch() : enrol_lti\tool_provider
• ONLYOFFICIAL : MoodleQuickForm_tags
• onQuickFormEvent() : MoodleQuickForm_autocomplete , MoodleQuickForm_cancel , MoodleQuickForm_checkbox , MoodleQuickForm_date_selector , MoodleQuickForm_date_time_selector , MoodleQuickForm_defaultcustom , MoodleQuickForm_duration , MoodleQuickForm_editor , MoodleQuickForm_filemanager , MoodleQuickForm_filetypes , MoodleQuickForm_float , MoodleQuickForm_grading , MoodleQuickForm_group , MoodleQuickForm_modgrade , MoodleQuickForm_modvisible , MoodleQuickForm_selectgroups , MoodleQuickForm_selectyesno , MoodleQuickForm_submit , MoodleQuickForm_tags , MoodleQuickForm_textarea
• onRegister() : enrol_lti\tool_provider
• OP_AND : core_availability\tree
• OP_CONTAINS : availability_profile\condition
• OP_DOES_NOT_CONTAIN : availability_profile\condition
• OP_ENDS_WITH : availability_profile\condition
• OP_IS_EMPTY : availability_profile\condition
• OP_IS_EQUAL_TO : availability_profile\condition
• OP_IS_NOT_EMPTY : availability_profile\condition
• OP_NOT_AND : core_availability\tree
• OP_NOT_OR : core_availability\tree
• OP_OR : core_availability\tree
• OP_STARTS_WITH : availability_profile\condition
• open() : file_archive
• OPEN : file_archive
• open() : webdav_client , zip_archive
• open_xml_writer() : moodle1_qtype_handler , moodle1_xml_handler
• optimal_probablility_high() : question_cbm
• optimal_probablility_low() : question_cbm
• optimize() : core_search\engine , search_solr\engine
• optimize_index() : core_search\manager
• OPTION_BLOCK : core_media_manager
• option_description_string() : lesson_page , lesson_page_type_matching , lesson_page_type_multichoice , lesson_page_type_shortanswer
• OPTION_FALLBACK_TO_BLANK : core_media_manager
• OPTION_NO_LINK : core_media_manager
• OPTION_ORIGINAL_TEXT : core_media_manager
• option_to_class() : tool_analytics\output\helper
• OPTION_TRUSTED : core_media_manager
• optional_param() : moodleform , MoodleQuickForm
• optional_param_mark() : question_utils
• optionExists() : MoodleQuickForm_autocomplete
• OPTIONPREFIX : question_preview_options
• options() : curl , gradereport_singleview\local\screen\grade , gradereport_singleview\local\screen\screen , gradereport_singleview\local\screen\selectable_items , gradereport_singleview\local\screen\user , webdav_client
• order_all_observers() : core\event\manager
• order_by() : mod_glossary_entry_query_builder
• order_by_author() : mod_glossary_entry_query_builder
• order_sql() : core_analytics\local\analyser\base
• orderElements() : xmldb_object
• orderFields() : xmldb_table
• orderIndexes() : xmldb_table
• orderKeys() : xmldb_table
• orderTables() : xmldb_structure
• orig() : WikiDiff , WordLevelWikiDiff
• original_definition() : gradereport_singleview\local\screen\grade
• original_headers() : gradereport_singleview\local\screen\grade , gradereport_singleview\local\screen\user
• other_cols() : assign_grading_table , core_user\participants_table , flexible_table , mod_feedback_responses_table , quiz_last_responses_table , quiz_overview_table , quiz_statistics_question_table , tool_policy\acceptances_table , webservice\token_table
• other_plugins_that_require() : core_plugin_manager
• out() : core_user\participants_table , forumreport_summary\summary_table , lang_string , mod_feedback_responses_table , moodle_url , report_loglive_table_log_ajax , table_sql
• OUT : webservice_soap\wsdl
• out_as_local_url() : moodle_url
• out_omit_querystring() : moodle_url
• outcome() : core_question_renderer
• OUTCOME_COMPLETE : core_competency\competency , core_competency\course_competency , core_competency\course_module_competency
• OUTCOME_EVIDENCE : core_competency\competency , core_competency\course_competency , core_competency\course_module_competency
• outcome_from_results() : backup_cron_automated_helper
• OUTCOME_NEGATIVE : core_analytics\calculable
• OUTCOME_NEUTRAL : core_analytics\calculable
• OUTCOME_NONE : core_competency\competency , core_competency\course_competency , core_competency\course_module_competency
• OUTCOME_OK : core_analytics\calculable
• OUTCOME_RECOMMEND : core_competency\competency , core_competency\course_competency , core_competency\course_module_competency
• OUTCOME_VERY_NEGATIVE : core_analytics\calculable
• OUTCOME_VERY_POSITIVE : core_analytics\calculable
• outdated_langpack_is_installed() : behat_tool_langimport
• output() : combined_progress_trace , comment , core_h5p\player , error_log_progress_trace , file_xml_database_exporter , gradereport_singleview , html_list_progress_trace , html_progress_trace , null_progress_trace
• Output() : pdf
• output() : progress_trace , progress_trace_buffer , string_xml_database_exporter , text_progress_trace , tool_uploadcourse_tracker , xml_database_exporter
• output_all_question_response_analysis() : quiz_statistics_report
• output_caching_info() : quiz_statistics_report
• output_edit_lists() : question_category_object
• output_headers() : table_dataformat_export_format
• output_html() : admin_setting , admin_setting_configcheckbox , admin_setting_configcolourpicker , admin_setting_configdirectory , admin_setting_configduration , admin_setting_configempty , admin_setting_configexecutable , admin_setting_configfile , admin_setting_confightmleditor , admin_setting_configmulticheckbox , admin_setting_configmultiselect , admin_setting_configpasswordunmask , admin_setting_configselect , admin_setting_configstoredfile , admin_setting_configtext , admin_setting_configtextarea , admin_setting_configtime , admin_setting_courselist_frontpage , admin_setting_description , admin_setting_devicedetectregex , admin_setting_emoticons , admin_setting_enablemobileservice , admin_setting_filetypes , admin_setting_gradecat_combo , admin_setting_heading , admin_setting_ldap_rolemapping , admin_setting_manage_plugins , admin_setting_manageantiviruses , admin_setting_manageauths , admin_setting_managecustomfields , admin_setting_managedataformats , admin_setting_manageeditors , admin_setting_manageenrols , admin_setting_manageexternalservices , admin_setting_manageformats , admin_setting_managelicenses , admin_setting_managemediaplayers , admin_setting_managerepository , admin_setting_managewebserviceprotocols , admin_setting_managewebservicetokens , admin_setting_php_extension_enabled , admin_setting_searchsetupinfo , admin_setting_special_calendar_weekend , admin_setting_special_gradepointmax , admin_setting_webservicesoverview , admin_settingpage , core_admin\local\settings\filesize , editor_atto_subplugins_setting , editor_tinymce_json_setting_textarea , mod_quiz_admin_review_setting , theme_boost_admin_settingspage_tabs , tiynce_subplugins_settings , tool_log_setting_managestores
• OUTPUT_HTML : tool_uploadcourse_tracker
• output_individual_question_data() : quiz_statistics_report
• output_individual_question_response_analysis() : quiz_statistics_report
• output_log() : xhtml_container_stack
• output_msg() : behat_command
• output_new_table() : question_category_object
• output_optgroup() : user_selector_base
• output_options() : user_selector_base
• OUTPUT_PLAIN : tool_uploadcourse_tracker
• output_quiz_info_table() : quiz_statistics_report
• output_quiz_structure_analysis_table() : quiz_statistics_report
• output_select_html() : admin_setting_configselect
• output_setting_flag() : admin_setting_flag
• output_setting_flags() : admin_setting
• output_statistics_graph() : quiz_statistics_report
• output_user() : group_non_members_selector , user_selector_base
• ouwiki_changes() : ouwiki_changes
• ouwiki_line() : ouwiki_line
• ouwiki_word() : ouwiki_word
• overall_feedback() : mod_workshop_renderer
• overall_feedback_attachment_options() : workshop
• overall_feedback_content_options() : workshop
• OVERDUE : quiz_attempt
• override_active_url() : navigation_node
• override_activity_completion_status() : core_completion_external
• override_activity_completion_status_parameters() : core_completion_external
• override_activity_completion_status_returns() : core_completion_external
• override_children() : custom_menu
• override_exists() : assign
• override_next_page() : lesson_page , lesson_page_type_cluster , lesson_page_type_endofcluster
• overridetossl_warning() : core_admin_renderer
• OVERWRITE : file_archive
• overwrite_existing_draftfile() : repository