Function checkImageContents

Searches through the file to see if there's potentially harmful non-binary content. - if extensiveCheck is true, searches for asp/php short tags as well.

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`	`$fileName`	The path to the file
`boolean`	`$extensiveCheck = false`	Whether to perform extensive checks

Return value summary
`boolean`	Whether the image appears to be safe

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Function checkImageContents