Strict empty string content type checking in BodyParsingMiddleware::getMediaType #2958
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\Slim\Middleware\BodyParsingMiddleware::getMediaType()method has a loose comparison operator, which can make the function return(string) 0when the requestcontent-typeheader has a value of(string) 0. This is because PHP considers0 == ''.While this is unhighlike unlikely that it will lead to a bug, because the body parsers need to be registered by the
content-typeheader values, the===seems the accurate one to use to reduce this unexpected execution.