log() public méthode

The expression can be any valid expression as long as it resolves to a non-negative number. The expression can be any valid expression as long as it resolves to a positive number greater than 1.
See also: https://docs.mongodb.org/manual/reference/operator/aggregation/log/
Since: 1.3
public log ( mixed | self $number, mixed | self $base )
$number mixed | self
$base mixed | self
Expr Class Documentation
Exemple #1
0
 /**
  * Calculates the log of a number in the specified base and returns the
  * result as a double.
  *
  * The <number> expression can be any valid expression as long as it
  * resolves to a non-negative number.
  * The <base> expression can be any valid expression as long as it resolves
  * to a positive number greater than 1.
  *
  * @see https://docs.mongodb.org/manual/reference/operator/aggregation/log/
  * @see Expr::log
  * @param mixed|Expr $number
  * @param mixed|Expr $base
  * @return self
  *
  * @since 1.3
  */
 public function log($number, $base)
 {
     $this->expr->log($number, $base);
     return $this;
 }