Websites migrated or imported to Plesk work incorrectly: short_open_tag is disabled

Symptoms

• A website was migrated or imported to Plesk successfully, but its content is shown incorrectly.

• No errors are logged by the web server.

• Short tags may be found in the website's response:

  # curl -sLk https://example.com/ | grep -Eo '<?[^>]+>'
  <?if(isset(Route::url()['controller']):?>
  <?endif?>
  <?foreach($menu as $part=>
  <?endforeach?>

• The option short_open_tag is disabled in Domains > example.com > PHP Settings.

Cause

The websites use short tags (<? instead of <?php), however they are not processed because the parameter short_open_tag is disabled.

Resolution

1. Log into Plesk.

2. Go to Domains > example.com > PHP Settings.

3. Enable the option short_open_tag and click OK or Apply to save the changes.