Set
PHP Manual

Ds\Set::sum

(PECL ds >= 1.0.0)

Ds\Set::sumReturns the sum of all values in the set

Description

public number Ds\Set::sum ( void )

Returns the sum of all values in the set.

Note:

Arrays and objects are considered equal to zero when calculating the sum.

Parameters

This function has no parameters.

Return Values

The sum of all the values in the set as either a float or int depending on the values in the set.

Examples

Example #1 Ds\Set::sum() integer example

<?php
$set 
= new \Ds\Set([123]);
var_dump($set->sum());
?>

The above example will output something similar to:

int(6)

Example #2 Ds\Set::sum() float example

<?php
$set 
= new \Ds\Set([12.53]);
var_dump($set->sum());
?>

The above example will output something similar to:

float(6.5)

Set
PHP Manual