Retrieve data from database

Fatal error: Uncaught Error: Call to undefined function mysql_connect() in /homepages/39/d289036362/htdocs/new/faj-includes/users/annuaire/person.php:15 Stack trace: #0 /homepages/39/d289036362/htdocs/new/wp-content/plugins/wp-include-file/wp-include-file.php(176): include() #1 /homepages/39/d289036362/htdocs/new/wp-includes/shortcodes.php(326): wp_include_file(Array, '', 'include') #2 [internal function]: do_shortcode_tag(Array) #3 /homepages/39/d289036362/htdocs/new/wp-includes/shortcodes.php(223): preg_replace_callback('/\\[(\\[?)(includ...', 'do_shortcode_ta...', '[include file="...') #4 /homepages/39/d289036362/htdocs/new/wp-includes/plugin.php(235): do_shortcode('[include file="...') #5 /homepages/39/d289036362/htdocs/new/wp-content/themes/Maqfaj01/functions.php(367): apply_filters('the_content', '[include file="...') #6 /homepages/39/d289036362/htdocs/new/wp-content/themes/Maqfaj01/content-page.php(33): theme_get_content() #7 /homepages/39/d289036362/htdocs/new/wp-includes/template.php(574): require('/homepages/39/ in /homepages/39/d289036362/htdocs/new/faj-includes/users/annuaire/person.php on line 15