Since the width/height is in the first few bytes of the file, there is no need to download the entire file.
This is extremely slow on large images that are accessed remotely. Getimagesize() is the overall size (read from the logicalĪs noted below, getimagesize will download the entire image before it checks for the requested information. The size of the image which is reported by GIF images consist of one or more frames, where each frame may only occupy The information about icons are retrieved from the icon with the highest Getimagesize() returns the values for the firstĬodestream it encounters in the root of the file. Also, JP2įiles may contain multiple JPEG 2000 codestreams.
In this case, the value for "bits" is the highest bit depth encountered.
Note that JPC and JP2 are capable of having components with differentīit depths. The array may contain nonsensical values.ĭo not use getimagesize() to check that a givenįile is a valid image. If a non-image file is supplied, it may be incorrectlyĭetected as an image and the function will return successfully, but This function expects filename to be a valid
Php get imagetype from image url archive#
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