Documentation

Depreciation
in package

Table of Contents

Properties

$zeroPointZero  : float

Methods

DB()  : string|float|int
DB.
DDB()  : float|string
DDB.
SLN()  : float|string
SLN.
SYD()  : float|string
SYD.
validateCost()  : float
validateFactor()  : float
validateLife()  : float
validateMonth()  : int
validatePeriod()  : float
validateSalvage()  : float

Properties

$zeroPointZero

private static float $zeroPointZero = 0.0

Methods

DB()

DB.

public static DB(mixed $cost, mixed $salvage, mixed $life, mixed $period[, mixed $month = 12 ]) : string|float|int

Returns the depreciation of an asset for a specified period using the fixed-declining balance method. This form of depreciation is used if you want to get a higher depreciation value at the beginning of the depreciation (as opposed to linear depreciation). The depreciation value is reduced with every depreciation period by the depreciation already deducted from the initial cost.

Excel Function: DB(cost,salvage,life,period[,month])

Parameters
$cost : mixed

Initial cost of the asset

$salvage : mixed

Value at the end of the depreciation. (Sometimes called the salvage value of the asset)

$life : mixed

Number of periods over which the asset is depreciated. (Sometimes called the useful life of the asset)

$period : mixed

The period for which you want to calculate the depreciation. Period must use the same units as life.

$month : mixed = 12

Number of months in the first year. If month is omitted, it defaults to 12.

Return values
string|float|int

DDB()

DDB.

public static DDB(mixed $cost, mixed $salvage, mixed $life, mixed $period[, mixed $factor = 2.0 ]) : float|string

Returns the depreciation of an asset for a specified period using the double-declining balance method or some other method you specify.

Excel Function: DDB(cost,salvage,life,period[,factor])

Parameters
$cost : mixed

Initial cost of the asset

$salvage : mixed

Value at the end of the depreciation. (Sometimes called the salvage value of the asset)

$life : mixed

Number of periods over which the asset is depreciated. (Sometimes called the useful life of the asset)

$period : mixed

The period for which you want to calculate the depreciation. Period must use the same units as life.

$factor : mixed = 2.0

The rate at which the balance declines. If factor is omitted, it is assumed to be 2 (the double-declining balance method).

Return values
float|string

SLN()

SLN.

public static SLN(mixed $cost, mixed $salvage, mixed $life) : float|string

Returns the straight-line depreciation of an asset for one period

Parameters
$cost : mixed

Initial cost of the asset

$salvage : mixed

Value at the end of the depreciation

$life : mixed

Number of periods over which the asset is depreciated

Return values
float|string —

Result, or a string containing an error

SYD()

SYD.

public static SYD(mixed $cost, mixed $salvage, mixed $life, mixed $period) : float|string

Returns the sum-of-years' digits depreciation of an asset for a specified period.

Parameters
$cost : mixed

Initial cost of the asset

$salvage : mixed

Value at the end of the depreciation

$life : mixed

Number of periods over which the asset is depreciated

$period : mixed

Period

Return values
float|string —

Result, or a string containing an error

validateCost()

private static validateCost(mixed $cost[, bool $negativeValueAllowed = false ]) : float
Parameters
$cost : mixed
$negativeValueAllowed : bool = false
Return values
float

validateFactor()

private static validateFactor(mixed $factor) : float
Parameters
$factor : mixed
Return values
float

validateLife()

private static validateLife(mixed $life[, bool $negativeValueAllowed = false ]) : float
Parameters
$life : mixed
$negativeValueAllowed : bool = false
Return values
float

validateMonth()

private static validateMonth(mixed $month) : int
Parameters
$month : mixed
Return values
int

validatePeriod()

private static validatePeriod(mixed $period[, bool $negativeValueAllowed = false ]) : float
Parameters
$period : mixed
$negativeValueAllowed : bool = false
Return values
float

validateSalvage()

private static validateSalvage(mixed $salvage[, bool $negativeValueAllowed = false ]) : float
Parameters
$salvage : mixed
$negativeValueAllowed : bool = false
Return values
float 

        

        
    




    

    

                                

                

                                
    

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