## FPDF

`FPDF([string orientation [, string unit [, mixed format]]])`

#### Version

1.0

#### Description

This is the class constructor. It allows to set up the page format, the orientation and the measure unit used in all the methods (except for the font sizes).

#### Parameters

`orientation`

> Default page orientation. Possible values are (case insensitive):
> - `P` or `Portrait`
> - `L` or `Landscape`
> Default value is `P`.

`unit`

> User measure unit. Possible values are:
> - `pt`: point
> - `mm`: millimeter
> - `cm`: centimeter
> - `in`: inch
> A point equals 1/72 of inch, that is to say about 0.35 mm (an inch being 2.54 cm). This is a very common unit in typography; font sizes are expressed in that unit.
> Default value is `mm`.

`format`

> The format used for pages. It can be either one of the following values (case insensitive):
> - `A3`
> - `A4`
> - `A5`
> - `Letter`
> - `Legal`
> or a custom format in the form of a two-element array containing the width and the height (expressed in the unit given by `unit`).

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