variant_sub()

variant_sub - Subtracts the value of the right variant from the left variant value

Syntax

mixed variant_sub (mixed $left, mixed $right)

Arguments

• left - The left operand.
• right - The right operand.

Description

Subtracts right from left.

Version

PHP 5

Return value

Variant Subtraction Rules 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