The partExists() function is related to the hasContent function, and tests for the simple presence of a specified page-part.

It can take two parameters:

1. A page-part must given as the first parameter. If it is found, the function returns “true”, otherwise it returns “false”. These results are returned whether or not the page-part actually contains any content.
2. Like the content() and hasContent() functions, partExists() can also be inherited by setting the second parameter to “true” (optional); by default this is set to “false”.

<?php if $this->partExists('page-part') {
  // do something if the part exists = true
} else {
  // do something else if the part does not exist = false
}; ?>

For more detail, see the hasContent() entry.