(PHP 5, PHP 7)
Subtracts the value of the right variant from the left variant value
mixed variant_sub ( mixed $left, mixed $right )
Subtracts right from left.
Parameters:
left
The left operand.
right
The right operand.
Returns:
| If | Then |
|---|---|
| Both expressions are of the string type | Subtraction |
| One expression is a string type and the other a character | Subtraction |
| One expression is numeric and the other is a string | Subtraction. |
| Both expressions are numeric | Subtraction |
| Either expression is NULL | NULL is returned |
| Both expressions are empty | Empty string is returned |
See also:
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