WordPress 4.9.6后台页面模板选项不显示，求原因分析

Hey there, let's break down why the Page Template dropdown might be missing from your WordPress 4.9.6 admin—even after reinstalling and switching to default themes/plugins:

• Your Default Theme Lacks Custom Page Templates
  WordPress only shows the Page Template option if your active theme has at least one custom template file (marked with a Template Name: comment at the top). For example, older default themes like Twenty Seventeen only include a dedicated Front Page Template (which only appears when setting your site’s homepage) and no extra templates for regular pages. If that’s the case, the missing option is actually expected behavior.

• Incomplete WordPress Core Reinstallation
  A quick reinstall might not fully overwrite corrupted core files. The code that renders the Page Template dropdown lives in wp-admin/includes/meta-boxes.php—if this file is damaged, the option won’t load. Try manually downloading WordPress 4.9.6, extracting the zip, and replacing the wp-admin and wp-includes directories (leave wp-content untouched to keep your content/themes/plugins intact).

• Corrupted Default Theme Files
  Even default themes can have file corruption if the reinstall didn’t properly overwrite theme files. Check your default theme’s directory (e.g., /wp-content/themes/twentyseventeen) for files starting with page- or labeled as templates. Open them in a text editor to confirm they have the required comment block at the top:

  <?php
  /*
  Template Name: [Template Name]
  */
  ?>
  

  If these comments are missing or the files are damaged, WordPress won’t register the template.

• Browser Cache or Admin UI Glitch
  Older WordPress versions like 4.9.6 can have minor UI bugs caused by cached browser data. Try clearing your browser cache, opening the admin in incognito/private mode, or switching to a different browser to rule out this issue.

• User Role Permission Restrictions
  While less likely, double-check that your user account has the edit_pages capability (admins and editors have this by default). If you’re using a custom role, it might lack permission to modify page attributes like templates.

内容的提问来源于stack exchange，提问作者Anudeepsyamprasad