[thelist] Binary file manipulation in PHP

Jeffrey Barke jeffrey.barke at themechanism.com
Wed Feb 13 13:33:59 CST 2008


I only worked with binary files once and it was experiment, but I  
believe you need the pack() and unpack() functions:


On Feb 13, 2008, at 11:26 AM, Rick den Haan wrote:

> David Menzel wrote:
>> While I havnt done to much with binary files in php, i believe you  
>> need
>> the file_get_contents function.
>> http://us.php.net/manual/en/function.file-get-contents.php
>> Also, you could try setting the binary flag on fread if you havnt  
>> already.
>> Good luck
> Thanks, but getting the contents of the file is no problem. For  
> example, to
> get the version number (first 2 bytes in the file), I use:
> $rHandler = fopen($sFilename, 'rb');
> $binVersion = fread($rHandler, 2);
> This moves the pointer, so to get the file type (the next 8 bytes),  
> I can
> then do
> $binType = fread($rHandler, 8);
> to get bytes 3 through 10.
> The trick is, what do I need to do to $binVersion and $binType to get
> something human-readable?
> Thanks,
> Rick.
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Jeffrey Barke
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