Function reencodeImage

Used to re-econodes an image to a specified image format - creates a copy of the file at the same location as fileName. - the file would have the format preferred_format if possible, otherwise the default format is jpeg. - the function makes sure that all non-essential image contents are disposed.

Package: SMF
Copyright: 2020 Simple Machines and individual contributors
License: BSD
Author: Simple Machines https://www.simplemachines.org
Located at Sources/Subs-Graphics.php

Parameters summary
`string`	`$fileName`	The path to the file
`integer`	`$preferred_format = 0`	The preferred format - 0 to automatically determine, 1 for gif, 2 for jpg, 3 for png, 6 for bmp and 15 for wbmp

Return value summary
`boolean`	Whether the reencoding was successful

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Function reencodeImage