What kind of image format is this?

My webserver is receiving image data from an iOS App via HTTP POST.

The transmitted image-data looks like this:

$postvar1=x&image=<89504e47 0d0a1a0a 0000000d 49484452 00000100 00000064 08060000 006960ee 9e000020 00494441 547801ed 5d099c14 c5b9afea 9ed9fb98 5941c428 a2c62320 0a开发者_开发问答8a8047 3cf06017 573cc178 c0eea246 8db9f4f9 e22f79fa 7c26e6c5 f78cd1e4 19351ad9 5d0ea360 3c815d62 bc350a51 f008781b 82181570 67f66477

I don't know what to do with this string in PHP. What kind of encoding is it? Thanks!

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Its a PNG file.

The PNG Magic number is 8950.4e47.0d0a.1a0a

ASCI \x89PNG\r\n\x1a\n

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It's binary, it's an image file, it can't "Do" anything with it as it is...

And according to my hex editor, it's a PNG...

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Since the other answers miss it: It what you get from -[NSData description] (a hexdump between angle brackets, like <01234567 89ABCDEF>). This probably happens due to someone doing something like [NSString stringWithFormat:@"blah&image=%@", data]. The reasons why this is terrible are too numerous to mention.

It's far, far preferable to upload as multipart/form-data or (if you send any other fields you need in a header) just image/png or application/octet-stream. The hexdump overhead is huge.

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It's a png here is it

http://i.stack.imgur.com/bUXLb.png

256x100 but it's just transparent

If you want to convert it in php have a look at the pack function