PHP 5, PHP 7, PHP 8
variant_cat - Concatenates two variant values together and returns the result

variant_cat( mixed$left, mixed$right ): variant

Concatenates left with right and returns the result.

This function is notionally equivalent to $left . $right.



The left operand.


The right operand.


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 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.

Return Values

Returns the result of the concatenation.

Exceptions and Errors

Throws a com_exception on failure.