February 12, 2011 
Definition:
function is_page( $page = '' ) {}
Is the query for a single page?
If the $page parameter is specified, this function will additionally check if the query is for one of the pages specified.
Parameters
- mixed $page: Page ID, title, slug, or array of such.
Source code
function is_page( $page = '' ) {
if ( !$this->is_page )
return false;
if ( empty( $page ) )
return true;
$page_obj = $this->get_queried_object();
$page = (array) $page;
if ( in_array( $page_obj->ID, $page ) )
return true;
elseif ( in_array( $page_obj->post_title, $page ) )
return true;
else if ( in_array( $page_obj->post_name, $page ) )
return true;
return false;
}
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