wpcf7_init хук-событие . CF7 1.0

add_action( 'wpcf7_init', 'action_function_name_8818' );
function action_function_name_8818(){
	// action...
}

wpcf7_init

do_action( 'wpcf7_init' );

add_action( 'wpcf7_init', 'wpcf7_add_form_tag_acceptance', 10, 0 );

add_action( 'wpcf7_init', 'wpcf7_add_form_tag_checkbox', 10, 0 );

add_action( 'wpcf7_init', 'wpcf7_add_form_tag_count', 10, 0 );

add_action( 'wpcf7_init', 'wpcf7_add_form_tag_date', 10, 0 );

add_action( 'wpcf7_init', 'wpcf7_add_form_tag_file', 10, 0 );

add_action( 'wpcf7_init', 'wpcf7_add_form_tag_hidden', 10, 0 );

add_action( 'wpcf7_init', 'wpcf7_add_form_tag_number', 10, 0 );

add_action( 'wpcf7_init', 'wpcf7_add_form_tag_quiz', 10, 0 );

add_action( 'wpcf7_init', 'wpcf7_add_form_tag_captcha', 10, 0 );

add_action( 'wpcf7_init', 'wpcf7_recaptcha_add_form_tag_recaptcha', 10, 0 );

add_action( 'wpcf7_init', 'wpcf7_recaptcha_register_service', 15, 0 );

add_action( 'wpcf7_init', 'wpcf7_add_form_tag_response', 10, 0 );

add_action( 'wpcf7_init', 'wpcf7_add_form_tag_select', 10, 0 );

add_action( 'wpcf7_init', 'wpcf7_sendinblue_register_service', 1, 0 );

add_action( 'wpcf7_init', 'wpcf7_add_form_tag_submit', 10, 0 );

add_action( 'wpcf7_init', 'wpcf7_add_form_tag_text', 10, 0 );

add_action( 'wpcf7_init', 'wpcf7_add_form_tag_textarea', 10, 0 );