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Date: Fri, 13 Jul 2007 15:18:17 +0200
To: Adrian Drumea <adrian.drumea@sysmart.com>
Cc: internals@lists.php.net
Message-ID: <20070713131817.GE9779@fearless.intra.coretrek.com>
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Subject: Re: [PHP-DEV] Memory streams
From: frode@CoreTrek.no ("Frode E. Moe")

On Fri, Jul 13, 2007 at 16:02:40 +0300, Adrian Drumea wrote:
> Hello,
> 
> I'm new to this list, so I aplogize if this is not the place to 
> post this message.
> 
> I was using today the getimagesize() function which takes a file 
> name. I was trying to take the size of an image decoded using
> base64_decode from a string. So I have my decoded data in $data.
> Now to apply getimagesize() I need a file, so I saved $data to 
> a temporary file and everything worked. I then tried to avoid
> the temporary file by using i/o streams, but I didn't manage to 
> do this. 
> 
> Correct me if I am wrong, but from what I see there is no way
> to create a memory stream using php://memory and also attach
> a unique key to it. If that would be possible, I could create 
> a memory stream with a unique key, write the data into it and
> then pass this memory stream name to the getimagesize() function.
> 
> In this way, all functions requiring a file could be used on
> a memory buffer. 

You could implement your own stream with stream_wrapper_register(), and
then use URLs like "mycustomstream://12345678", and your stream
implementation could then extract the "12345678" part to use as a key,
for example.