variant_sub

(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:
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
See also:

variant_add() -

doc_php
2016-02-24 16:14:29
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