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
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