Using PHP's zlib compression and decompression SWF file

I've written about how to use C # to compress and decompress a SWF file. Decompression, compression and read Flash header file information need to use an open Source link library, and not very convenient to use, but use PHP is not the same, PHP contains the zlib link library, you can directly use its related functions, Here are my examples of compressed and knot-compressed SWF files:

Not joined to determine whether the SWF file has been compressed, in need can be based on the first byte of the file is ' F ' or ' C ' to determine


To compress a SWF file:

<?php
//--------------------------------------------------------------------------------------------------
Filename
$filename = "test.swf";
Open File
$rs = fopen ($filename, "R");
Reading data from a file
$str = Fread ($rs, FileSize ($filename));
Set SWF header File
$head = substr ($str, 1,8);
$head = "C". $head;
Get SWF file contents
$body = substr ($STR, 8);
Compress file contents using the highest compression level 9
$body = Gzcompress ($body, 9);
Merging file headers and content
$str = $head. $body;
Turn off the Read file stream
Fclose ($RS);
Create a new file
$ws = fopen ("create.swf", "w");
Write a file
Fwrite ($ws, $STR);
Close file Stay
Fclose ($WS);
//----------------------------------------------------------------------------------------------------
?>
To extract a SWF file:

<?php
//----------------------------------------------------------------------------------------------------
Filename
$filename = "test.swf";
Open File
$rs = fopen ($filename, "R");
Reading data from a file
$str = Fread ($rs, FileSize ($filename));
Set SWF header File
$head = substr ($str, 1,8);
$head = "F". $head;
Get SWF file contents
$body = substr ($STR, 8);
Extract the contents of a file
$body = gzuncompress ($body);
Merging file headers and content
$str = $head. $body;
Turn off the Read file stream
Fclose ($RS);
Create a new file
$ws = fopen ("create.swf", "w");
Write a file
Fwrite ($ws, $STR);
Close file Stay
Fclose ($WS);
//----------------------------------------------------------------------------------------------------
?>

Is it easy? hehe, PHP gives us more than just simple ...