(PHP 5, PHP 7)
"Adds" two variant values together and returns the result
mixed variant_add ( mixed $left, mixed $right )
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 |
Parameters:
left
The left operand.
right
The right operand.
Returns:
Returns the result.
See also:
Please login to continue.