Here is a quick list of all of the hooks and filters inside the plugin.

Hooks

No.	Hook Name	File
1	qsm_welcome_panel	php/admin/admin-dashboard.php
2	qsm_below_admin_results	php/admin/admin-results-details-page.php
3	qsm_before_delete_result	php/admin/admin-results-page.php
4	qsm_add_after_default_theme	php/admin/functions.php
5	qsm_add_after_themes	php/admin/functions.php
6	qsm_after_send_email_label	php/admin/options-page-email-tab.php
7	qsm_email_condition_criteria	php/admin/options-page-email-tab.php
8	qsm_email_extra_condition_fields	php/admin/options-page-email-tab.php
9	qsm_email_condition_operator	php/admin/options-page-email-tab.php
10	qsm_email_condition_value	php/admin/options-page-email-tab.php
11	qsm_after_options	php/admin/options-page-questions-tab.php
12	qsm_question_form_fields	php/admin/options-page-questions-tab.php
13	qsm_question_form_fields_side	php/admin/options-page-questions-tab.php
14	qsm_action_quiz_page_attributes_fields	php/admin/options-page-questions-tab.php
15	qsm_admin_single_answer_option_fields	php/admin/options-page-questions-tab.php
16	qsm_admin_after_single_answer_template	php/admin/options-page-questions-tab.php
17	qsm_results_page_condition_criteria	php/admin/options-page-results-page-tab.php
18	qsm_results_page_extra_condition_fields	php/admin/options-page-results-page-tab.php
19	qsm_results_page_condition_operator	php/admin/options-page-results-page-tab.php
20	qsm_results_page_condition_value	php/admin/options-page-results-page-tab.php
21	qsm_add_filter_menu	php/admin/options-page-style-tab.php
22	qsm_before_delete_quiz	php/admin/quizzes-page.php
23	qmn_quiz_taken_stats_options	php/admin/stats-page.php
24	wp_pre_insert_qmn_log	php/classes/class-qmn-log-manager.php
25	wp_post_insert_qmn_log	php/classes/class-qmn-log-manager.php
26	qsm_after_question	php/classes/class-qmn-plugin-helper.php
27	qmn_quiz_created	php/classes/class-qmn-quiz-creator.php (Based on WordPress’s default functionality, it is not possible to call the same hook twice with the same priority. To make it work you need to change its priority)
28	qmn_quiz_deleted	php/classes/class-qmn-quiz-creator.php
29	qsm_quiz_name_edited	php/classes/class-qmn-quiz-creator.php
30	qmn_quiz_name_edited	php/classes/class-qmn-quiz-creator.php
31	qmn_quiz_duplicated	php/classes/class-qmn-quiz-creator.php
32	qsm_enqueue_script_style	php/classes/class-qmn-quiz-manager.php
33	qsm_before_end_quiz_form	php/classes/class-qmn-quiz-manager.php
34	qsm_after_begin_message	php/classes/class-qmn-quiz-manager.php
35	qsm_action_before_page	php/classes/class-qmn-quiz-manager.php
36	mlw_qmn_end_quiz_section	php/classes/class-qmn-quiz-manager.php
37	qsm_after_all_section	php/classes/class-qmn-quiz-manager.php
38	qsm_quiz_submitted	php/classes/class-qmn-quiz-manager.php
39	mlw_qmn_load_results_page	php/classes/class-qmn-quiz-manager.php
40	qsm_extra_contact_filed	php/classes/class-qsm-contact-manager.php
41	qsm_contact_fields_end	php/classes/class-qsm-contact-manager.php
42	qsm_extra_setting_fields	php/classes/class-qsm-install.php
43	qsm_before_results_page	php/classes/class-qsm-results-pages.php
44	qsm_after_results_page	php/classes/class-qsm-results-pages.php
45	qsm_save_result_pages	php/classes/class-qsm-results-pages.php
46	qsm_saved_question_data	php/rest-api.php

Filters

No.	Hook Name	File
1	qsm_dashboard_widget	php/admin/admin-dashboard.php
2	qsm_quiz_wizard_settings_option_save	php/admin/admin-dashboard.php
3	mlw_qmn_template_variable_results_array	php/admin/admin-results-details-page.php
4	qsm_admin_results_details_page_allow_html	php/admin/admin-results-details-page.php
5	qsm_results_delete_clause	php/admin/admin-results-page.php
6	mlw_qmn_admin_results_page_headings	php/admin/admin-results-page.php
7	mlw_qmn_admin_results_page_column_content	php/admin/admin-results-page.php
8	mlw_qmn_admin_results_page_result	php/admin/admin-results-page.php
9	qsm_quiz_wizard_settings_option	php/admin/functions.php
10	qsm_text_variable_list	php/admin/functions.php
11	qsm_text_variable_list_email	php/admin/options-page-email-tab.php
12	qsm_filter_quiz_page_attributes	php/admin/options-page-questions-tab.php
13	qsm_question_type_description	php/admin/options-page-questions-tab.php
14	qsm_polar_class	php/admin/options-page-questions-tab.php
15	qsm_question_advanced_option	php/admin/options-page-questions-tab.php
16	qsm_question_format_option	php/admin/options-page-questions-tab.php
17	qsm_question_category_option	php/admin/options-page-questions-tab.php
18	qsm_question_advanced_option	php/admin/options-page-questions-tab.php
19	qsm_text_variable_list_result	php/admin/options-page-results-page-tab.php
20	qsm_theme_settings	php/admin/options-page-style-tab.php
21	qsm_text_allowed_variables	php/admin/options-page-text-tab.php
22	quiz_query_condition_clause	php/admin/quizzes-page.php
23	quiz_query_condition_clause	php/admin/quizzes-page.php
24	qmn_quiz_taken_stats_load_stats	php/admin/stats-page.php
25	qsm_alert_messages	php/classes/class-qmn-alert-manager.php
26	qsm_warning_messages	php/classes/class-qmn-alert-manager.php
27	qmn_log_types	php/classes/class-qmn-log-manager.php
28	qmn_log_post_type_args	php/classes/class-qmn-log-manager.php
29	quiz_query_delete_clause	php/classes/class-qmn-plugin-helper.php
30	qsm_section_setting_text	php/classes/class-qmn-plugin-helper.php
31	qsm_single_question_answers	php/classes/class-qmn-plugin-helper.php
32	qmn_quiz_setting_tabs	php/classes/class-qmn-plugin-helper.php
33	qms_preferred_date_format	php/classes/class-qmn-plugin-helper.php
34	qsm_file_upload_mime_type	php/classes/class-qmn-quiz-manager.php
35	qsm_shortcode_quiz_options	php/classes/class-qmn-quiz-manager.php
36	qmn_begin_shortcode	php/classes/class-qmn-quiz-manager.php
37	qmn_json_data	php/classes/class-qmn-quiz-manager.php
38	qmn_end_shortcode	php/classes/class-qmn-quiz-manager.php
39	qsm_load_questions_ids	php/classes/class-qmn-quiz-manager.php
40	qsm_load_questions_ids	php/classes/class-qmn-quiz-manager.php
41	qsm_load_questions_filter	php/classes/class-qmn-quiz-manager.php
42	qmn_begin_quiz	php/classes/class-qmn-quiz-manager.php
43	qsm_display_before_form	php/classes/class-qmn-quiz-manager.php
44	qmn_begin_quiz_form	php/classes/class-qmn-quiz-manager.php
45	qmn_begin_quiz_questions	php/classes/class-qmn-quiz-manager.php
46	qmn_before_comment_section	php/classes/class-qmn-quiz-manager.php
47	qmn_after_comment_section	php/classes/class-qmn-quiz-manager.php
48	qmn_before_error_message	php/classes/class-qmn-quiz-manager.php
49	qmn_end_quiz_form	php/classes/class-qmn-quiz-manager.php
50	qmn_end_quiz	php/classes/class-qmn-quiz-manager.php
51	mlw_qmn_template_variable_quiz_page	php/classes/class-qmn-quiz-manager.php
52	qsm_display_pages	php/classes/class-qmn-quiz-manager.php
53	qsm_total_pages_count	php/classes/class-qmn-quiz-manager.php
54	qsm_auto_page_begin_row	php/classes/class-qmn-quiz-manager.php
55	qmn_begin_results	php/classes/class-qmn-quiz-manager.php
56	qsm_result_variables	php/classes/class-qmn-quiz-manager.php
57	qmn_after_check_answers	php/classes/class-qmn-quiz-manager.php
58	qmn_after_check_comments	php/classes/class-qmn-quiz-manager.php
59	qsm_results_array	php/classes/class-qmn-quiz-manager.php
60	qmn_after_results_text	php/classes/class-qmn-quiz-manager.php
61	qmn_after_social_media	php/classes/class-qmn-quiz-manager.php
62	qsm_retake_quiz_text	php/classes/class-qmn-quiz-manager.php
63	qmn_filter_email_content	php/classes/class-qmn-quiz-manager.php
64	qmn_after_send_user_email	php/classes/class-qmn-quiz-manager.php
65	qmn_after_send_admin_email	php/classes/class-qmn-quiz-manager.php
66	qmn_end_results	php/classes/class-qmn-quiz-manager.php
67	qmn_captcha_varification_failed_msg	php/classes/class-qmn-quiz-manager.php
68	mlw_qmn_template_variable_results_page	php/classes/class-qmn-quiz-manager.php
69	qsm_submit_results_return_array	php/classes/class-qmn-quiz-manager.php
70	qsm_result_question_types	php/classes/class-qmn-quiz-manager.php
71	qmn_results_array	php/classes/class-qmn-quiz-manager.php
72	qmn_answer_array	php/classes/class-qmn-quiz-manager.php
73	qsm_check_answers_results	php/classes/class-qmn-quiz-manager.php
74	qmn_returned_comments	php/classes/class-qmn-quiz-manager.php
75	qsm_single_answer_arr	php/classes/class-qmn-quiz-manager.php
76	qmn_returned_social_buttons	php/classes/class-qmn-quiz-manager.php
77	qsm_user_email_attachments	php/classes/class-qmn-quiz-manager.php
78	qsm_admin_contact_label_disallow_html	php/classes/class-qsm-contact-manager.php
79	qsm_email_condition_check	php/classes/class-qsm-emails.php
80	qsm_send_results_email_addresses	php/classes/class-qsm-emails.php
81	qmn_email_template_variable_results	php/classes/class-qsm-emails.php
82	qsm_send_results_email_headers	php/classes/class-qsm-emails.php
83	qsm_user_email_attachments	php/classes/class-qsm-emails.php
84	qsm_admin_email_attachments	php/classes/class-qsm-emails.php
85	qsm_load_question	php/classes/class-qsm-questions.php
86	qsm_load_questions_by_pages	php/classes/class-qsm-questions.php
87	qsm_load_questions	php/classes/class-qsm-questions.php
88	qsm_answers_before_save	php/classes/class-qsm-questions.php
89	qsm_trim_question_description	php/classes/class-qsm-questions.php
90	qsm_save_question_data	php/classes/class-qsm-questions.php
91	qsm_results_page_condition_check	php/classes/class-qsm-results-pages.php
92	qsm_admin_results_page_disallow_html	php/classes/class-qsm-results-pages.php
93	qsm_filter_feature_image_size	php/question-types/qsm-question-title.php
94	qmn_captcha_display_front	php/question-types/qsm-question-type-captcha.php
95	qmn_date_display_front	php/question-types/qsm-question-type-date.php
96	qmn_date_review	php/question-types/qsm-question-type-date.php
97	qmn_drop_down_display_front	php/question-types/qsm-question-type-dropdown.php
98	qmn_drop_down_review	php/question-types/qsm-question-type-dropdown.php
99	qmn_file_upload_display_front	php/question-types/qsm-question-type-file-upload.php
100	qmn_file_upload_review	php/question-types/qsm-question-type-file-upload.php
101	qmn_fill_blank_display_front	php/question-types/qsm-question-type-fill-in-the-blanks.php
102	qmn_fill_blank_review	php/question-types/qsm-question-type-fill-in-the-blanks.php
103	qsm_answer_wrapper_class	php/question-types/qsm-question-type-multiple-choice-horizontal.php
104	qsm_multiple_choice_horizontal_display_loop	php/question-types/qsm-question-type-multiple-choice-horizontal.php
105	qmn_horizontal_multiple_choice_question_display	php/question-types/qsm-question-type-multiple-choice-horizontal.php
106	qmn_horizontal_multiple_choice_display_front	php/question-types/qsm-question-type-multiple-choice-horizontal.php
107	qmn_horizontal_multiple_choice_review	php/question-types/qsm-question-type-multiple-choice-horizontal.php
108	qsm_multiple_choice_display_loop	php/question-types/qsm-question-type-multiple-choice.php
109	qmn_multiple_choice_display_front	php/question-types/qsm-question-type-multiple-choice.php
110	qmn_multiple_choice_review	php/question-types/qsm-question-type-multiple-choice.php
111	qmn_horizontal_multiple_response_display_front	php/question-types/qsm-question-type-multiple-response-horizontal.php
112	qmn_horizontal_multiple_response_review	php/question-types/qsm-question-type-multiple-response-horizontal.php
113	qmn_multiple_response_display_front	php/question-types/qsm-question-type-multiple-response.php
114	qmn_multiple_response_review	php/question-types/qsm-question-type-multiple-response.php
115	qmn_number_display_front	php/question-types/qsm-question-type-number.php
116	qmn_number_review	php/question-types/qsm-question-type-number.php
117	qmn_accept_display_front	php/question-types/qsm-question-type-opt-in.php
118	qmn_large_open_display_front	php/question-types/qsm-question-type-paragraph.php
119	qmn_large_open_review	php/question-types/qsm-question-type-paragraph.php
120	qmn_polar_review	php/question-types/qsm-question-type-polar.php
121	qmn_small_open_display_front	php/question-types/qsm-question-type-short-answer.php
122	qmn_small_open_review	php/question-types/qsm-question-type-short-answer.php
123	qsm_rest_api_filter_question_data	php/rest-api.php
124	qsm_section_setting_text	php/template-variables.php
125	qsm_result_page_custom_default_template	php/template-variables.php
126	qsm_result_page_custom_user_answer_template	php/template-variables.php
127	qsm_result_page_custom_correct_answer_template	php/template-variables.php
128	qsm_question_answers_template_variable	php/template-variables.php
129	qmn_variable_question_answers	php/template-variables.php
130	qsm_question_max_point	php/template-variables.php
131	qmn_polar_display_front	php/template-variables.php
132	qsm_results_css_inliner	View File

qsm_result_css_inliner

The qsm_results_css_inliner filter allows you to add the inline CSS of responses in emails.

Add the following example code in the theme functions file (functions.php)

add_filter('qsm_results_css_inliner','qsm_custom_results_css_inliner',20);
function qsm_custom_results_css_inliner( $html ) {

	$incorrect_answer = "<span style='color:#222222;display:block;margin-bottom:5px;'>";
	$correct_answer   = "<span style='color:red;display:block;margin-bottom:5px;'>&#10003;";
	$simple_answer    = "<span style='color:#808080;display:block;margin-bottom:5px;'>&#8226;&nbsp;";
	$html             = str_replace( '<br/>', '<br>', $html );
	$html             = str_replace( '<br />', '<br>', $html );
	$html             = str_replace( '<span class="qsm-text-wrong-option qmn_image_option">', "$incorrect_answer ", $html );
	$html             = str_replace( '<span class="qsm-text-correct-option qmn_image_option">', "$correct_answer ", $html );
	$html             = str_replace( '<span class="qsm-text-correct-option qsm-text-user-correct-answer qmn_image_option">', "$correct_answer ", $html );
	$html             = str_replace( '<span class="qsm-text-simple-option qmn_image_option">', "$simple_answer ", $html );
	$html             = str_replace( '<span class="qsm-text-correct-option qsm-text-user-correct-answer ">', "$correct_answer ", $html );
	$html             = str_replace( '<span class="qsm-text-simple-option ">', "$simple_answer ", $html );
	$html             = str_replace( '<span class="qsm-text-wrong-option ">', "$incorrect_answer ", $html );
	$html             = str_replace( '<span class="qsm-text-correct-option ">', "$correct_answer ", $html );
	$html             = str_replace( '<span class="qmn_user_incorrect_answer">', "$incorrect_answer ", $html );
	$html             = str_replace( '<span class="qmn_user_correct_answer qsm-text-correct-option qsm-text-user-correct-answer">', "$correct_answer ", $html );
	$html             = str_replace( "class='qmn_question_answer", "style='margin-bottom:30px' class='", $html );

	return $html;
}

Tags filters, hooks