variant_sub
PHP function
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(PHP 5, PHP 7, PHP 8)
Subtracts the value of the right variant from the left variant value
Description
variant_sub(mixed $left, mixed $right): variant
Subtracts right from left.
Parameters
leftThe left operand.
rightThe right operand.
Variant-arith
Return Values
| 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 |
Errors/Exceptions
Throws a com_exception on failure.