With this plugin you can export any installed theme as a .zip file and then install that same theme on another server through the normal "Upload Theme" screen.

Who can export a theme?

Users who can install themes (administrators on a single site, super admins on multisite). An export contains the theme's full PHP source, so the plugin no longer settles for the weaker manage_options check it used up to 2.12. You can change this with the wpct_capability filter.

Are development files included?

.git, `.svn`, `.hg`, `node_modules` and `.DS_Store` are left out. Use the
wpct_should_skip_file filter to change that.

3.0.1

• Update the plugin URI to point at the plugin landing page.

3.0

• Compatible with WordPress 7.0 and PHP 8.
• Fixed: the plugin could not be activated at all on PHP 8. The activation hook pointed at install_wpct, but the function is called wpct_install_wpct; an invalid callback is a fatal TypeError since PHP 8.
• Fixed: exporting died with "Path cannot be empty". The bundled PclZip library still used a PHP 4 style constructor, which PHP 8 no longer treats as a constructor, so the archive name was never set. Exports now use ZipArchive, and fall back to the maintained copy of PclZip that ships with WordPress.
• Fixed: removed the third argument of define(), dropped in PHP 8.
• Security: the export form had no nonce and no capability check on submit, so any logged-in visitor could be made to trigger an export through a crafted request. Both are enforced now.
• Security: the requested theme name was pasted straight into a filesystem path. It is now validated against the list of installed themes.
• Security: archives were written into the plugin's own folder and served by redirect, which left every export downloadable by anyone who guessed the URL. They are now built outside the web root, streamed to the browser and deleted immediately. Activating this version also deletes any archive left behind by an older one.
• Removed: session_start() and ob_start() on every request, which broke page caching and emitted notices.
• Removed: the bundled 5,700 line copy of PclZip.
• Fixed: the theme list no longer comes from a hand-rolled readdir() on a path guessed with substr($_SERVER['SCRIPT_FILENAME'], 0, -19). It uses wp_get_themes(), so themes in a custom theme root are listed too, with their real names.
• Fixed: all output is escaped, and the form no longer relies on PHP short open tags.
• Added: proper internationalisation with the wp-clone-template text domain.
• Added: wpct_capability and wpct_should_skip_file filters.

2.12

• Typo fixed

2.1

• Warning fixed
• Language functions added

2.0

• Security bug fixed
• Old zip files are automatically deleted
• Better session management
• 100% WP 4.0 Compatible

1.5

• Permisson problems fixed.
• Warnings added.
• Directory structure changed.

1. Install and activate the plugin through the 'Plugins' menu in WordPress.
2. A new "Export" item appears under the "Appearance" menu.