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(PHP 5)

variant_sub --  subtracts the value of the right variant from the left variant value and returns the result

Description

mixed variant_sub ( mixed left, mixed right )

Subtracts right from left using the following rules:

Table 1. 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

Related Function(s)

variant_add()