Counting records is very easy with RedBeanPHP. For instance, to count all beans of type book use:
$numOfBooks = R::count( 'book' );
You can use additional SQL here as well:
$numOfBooks = R::count( 'book', ' pages > ? ', [ 250 ] );
Count related beans
Counting related beans is just as simple. To count all the pages of a 'book' bean:
$numPages = $book->countOwn( 'page' );
You can use the same technique for shared lists:
$numProjects = $member->countShared( 'project' );
You can also use withCondition() and alias():
$numProj = $member
->withCondition(' member_project.role ', ['lead'] ) )
->countShared( 'project' );
$numPages = $book
->withCondition( ' book_page.number > ? ',  )
->countOwn( 'page' );
$andy->alias( 'coAuthor' )->countOwn( 'book' );
$shop->via( 'relation' )->countShared( 'customer' );
The first example counts all projects associated with the member in which the member has the 'lead' role. The second example counts all the pages of a book having a page number > 100. Finally the last example demonstrates the use of an aliased list. Here we count the number of books written by Andy where he has been the co-author. All count operations return a number.
Counting something (R::count) that does not exist will not trigger an error but just return the number 0.
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