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variant_add

PHP function Edit on GitHub ✎

(PHP 5, PHP 7, PHP 8)

"Adds" two variant values together and returns the result

Description

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

Adds left to right using the following rules (taken from the MSDN library), which correspond to those of Visual Basic:

If	Then
Both expressions are of the string type	Concatenation
One expression is a string type and the other a character	Addition
One expression is numeric and the other is a string	Addition
Both expressions are numeric	Addition
Either expression is NULL	NULL is returned
Both expressions are empty	Integer subtype is returned

Variant-arith

Returns the result.

Throws a com_exception on failure.