Function getDpi

Get device independent pixels (Dpi)

Package: Slimore
Copyright: 2015 Pandao
License: License https://github.com/slimore/slimore#license
Author: Pandao slimore@ipandao.com
Located at Slimore/Helper/Functions.php

Parameters summary

`integer`	`$width`
`integer`	`$height`
`number`	`$inch`

Return value summary

`float`	float