toLower() public méthode

The argument can be any expression as long as it resolves to a string.
See also: http://docs.mongodb.org/manual/reference/operator/aggregation/toLower/
public toLower ( mixed | self $expression )
$expression mixed | self
Expr Class Documentation
Exemple #1
0
 /**
  * Converts a string to lowercase, returning the result.
  *
  * The argument can be any expression as long as it resolves to a string.
  *
  * @see http://docs.mongodb.org/manual/reference/operator/aggregation/toLower/
  * @see Expr::toLower
  * @param mixed|Expr $expression
  * @return self
  */
 public function toLower($expression)
 {
     $this->expr->toLower($expression);
     return $this;
 }