size() public method

The argument can be any expression as long as it resolves to an array.
See also: http://docs.mongodb.org/manual/reference/operator/aggregation/size/
public size ( mixed | self $expression )
$expression mixed | self
Expr Class Documentation
Esempio n. 1
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 /**
  * Counts and returns the total the number of items in an array.
  *
  * The argument can be any expression as long as it resolves to an array.
  *
  * @see http://docs.mongodb.org/manual/reference/operator/aggregation/size/
  * @see Expr::size
  * @param mixed|Expr $expression
  * @return self
  */
 public function size($expression)
 {
     $this->expr->size($expression);
     return $this;
 }