Fix trashing a snippet in Network Admin activating it on Multisite

[code-snippets-bot]

Current behavior

Trashing a network snippet in Multisite activates it regardless of its previous state. The Trash functions as a hidden 'enabled snippets' list, which is counterintuitive and potentially dangerous.

Steps to reproduce

1. Open this WordPress Playground with Multisite: WordPress Playground
2. Add the following test code:

   add_action('wp_footer', 'snippet_active_banner');
   add_action('admin_footer', 'snippet_active_banner');
   function snippet_active_banner() {
       echo '<div style="position:fixed;bottom:0;left:0;right:0;background:#4caf50;color:#fff;text-align:center;padding:10px;font-weight:600;z-index:999999;">✓ This Code Snippet is active!</div>';
   }

3. Click Save and Activate, navigate back to All Snippets → green banner appears
4. Deactivate the snippet → green banner disappears
5. Trash the deactivated snippet

Bug

• Green banner reappears → trashing has activated the snippet
• Trashing an inactive snippet → becomes active until deleted from Trash
• Trashing an active snippet → remains active until deleted from Trash

Observations

• Expected: Trashing should deactivate a snippet. Trashed snippets should never execute.
• Actual: Trashing activates the snippet. All trashed snippets execute their code.

Additional context

• This exact snippet breaks the site with: Fatal error: Cannot redeclare snippet_active_banner() when tested on multisite and with file-based execution enabled.
• The trash to activate behavioral glitch is not present with file-based execution enabled.
• Expected:
  • Snippet to work normally with and without file-based execution
  • Trashing a snippet must not reactivate it in any scenario
• Confirmed, but present only on multisite

Reference

Support forum link