如何使这个PHP if语句更简单，更短？

Question

I have feeling that the following code can be shortened but have no idea how to rewrite it :)

$post_type = isset( $_GET['post_type'] ) ? $_GET['post_type'] : '';

if( $post_type == 'faq' && !isset( $_REQUEST['mode'] ) )
  $_REQUEST['mode'] = 'excerpt';

// if I just go with else... it doesn't work
elseif( $post_type !== 'faq' && !isset( $_REQUEST['mode'] ) )
  $_REQUEST['mode'] = 'list';

Update

As you can see, !isset( $_REQUEST['mode'] ) is used twice. $post_type == 'faq' is also used twice, but in the elseif I'm checking negative.

Seriously there is no way to rewrite it to one if without else...?

Answer 1

How about using a ternary operator for testing 'faq' ?

$post_type = isset( $_GET['post_type'] ) ? $_GET['post_type'] : '';
if (!isset( $_REQUEST['mode'] )) {
    $_REQUEST['mode'] = ($post_type == 'faq') ? 'excerpt' : 'list';
}