# variant_mul

(PHP 5)

variant_mul --
multiplies the values of the two variants and returns the result

## Description

mixed

**variant_mul** ( mixed left, mixed right )

Multiplies `left`

by `right`

and
returns the result, subject to the following rules:

**Table 1. Variant Multiplication Rules**

If | Then |
---|

Both expressions are of the string, date, character, boolean type | Multiplication |

One expression is a string type and the other a
character | Multiplication |

One expression is numeric and the other is a string | Multiplication |

Both expressions are numeric | Multiplication |

Either expression is NULL | NULL is returned |

Both expressions are empty | Empty string is returned |

Boolean values are converted to -1 for **FALSE** and 0 for **TRUE**.

See also **variant_div()**,
**variant_idiv()**.

**Note: **
As with all the variant arithmetic functions, the parameters for this function
can be either a PHP native type (integer, string, floating point, boolean or
**NULL**), or an instance of a COM, VARIANT or DOTNET class. PHP native types
will be converted to variants using the same rules as found in the constructor
for the VARIANT class. COM and DOTNET objects
will have the value of their default property taken and used as the variant value.

The variant arithmetic functions are wrappers around the similarly named
functions in the COM library; for more information on these functions, consult
the MSDN library. The PHP functions are named slightly differently; for example
variant_add() in PHP corresponds to VarAdd() in the MSDN documentation.