Need help understanding/coding with Settings API

2 comments

1. You have some of the callback functions and the ID’s mixed up, try this:

   add_action('admin_init', function() {
       register_setting('elem_opts', 'elem_opts', 'elem_validate_opts');
       add_settings_section('elem_opts_form1', 'Elements Theme Options', 'elem_opts_form', 'elem_opts');
       add_settings_field('elem_opts_form', 'Facebook', 'elem_opts_social_fb_cb', 'elem_opts', 'elem_opts_form1');
   });
   
   function elem_opts_social_fb_cb() {
     $opts = get_option('elem_opts');
     if (empty($opts) || !is_array($opts)) {
       $opts = array();
     }
     ?>
     <input type="text" name="elem_opts[fb]" value="<?php echo $opts['fb'] ? $opts['fb'] : ''; ?>" />
     <?php
   }
   
   add_action('admin_menu', function() {
       add_theme_page('Elements Options', 'Elements Options', 'manage_options', 'elem_opts', 'elem_opts_cb');
   });
   
   function elem_validate_opts($input) {
     return $input;
   }
   
   function elem_opts_form() {
     ?>
     <p>Enable social network links, by entering your username for the respective social networks</p>
     <?php
   }
   
   function elem_opts_cb() {
       ?>
       <div class="wrap">
           <h2>Elements Theme Options</h2>
   
           <form action="options.php" method="post">
               <?php 
               settings_fields('elem_opts'); 
               do_settings_sections('elem_opts');
               ?>
               <input type="submit" name="Submit" value="Save changes" />
           </form>
       </div>
       <?php
   }
   

   which give me this:

   

   and for next time try to use different names and ids for each function, callback, section and page slug.

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2. See here for reference: Incorporating the Settings API in WordPress Themes. In particular, see Page 10.

   Your first problem, though I don’t know that it would cause the form section/field not to output, is that you pass the same string as the first argument to both add_settings_section() and add_settings_field(). For add_settings_field(), the first argument is the ID of the setting field itself, so it probably shouldn’t be the same thing as the first argument passed to add_settings_section(), which is the ID of the settings section.

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