Php zlib code for compressing and decompressing swf files

Php contains the zlib Link Library, which can be used directly. The following is an example of my compressed and compressed swf files:
// If the swf file is not compressed, the first byte of the file is 'f' or 'C '.
Compress the swf file:
// Configure //--------------------------------------------------------------------------------------------------
// File name
$ Filename = "test.swf ";
// Open the file
$ Rs = fopen ($ filename, "r ");
// Read the file data
$ Str = fread ($ rs, filesize ($ filename ));
// Set the swf header file
$ Head = substr ($ str, 1, 8 );
$ Head = "C". $ head;
// Obtain the swf File Content
$ Body = substr ($ str, 8 );
// Compress the file content with a maximum compression level of 9
$ Body = gzcompress ($ body, 9 );
// Merge the file header and content
$ Str = $ head. $ body;
// Close the Read File stream
Fclose ($ rs );
// Create a new file
$ Ws = fopen ("create.swf", "w ");
// Write an object
Fwrite ($ ws, $ str );
// Close file retention
Fclose ($ ws );
// Configure //----------------------------------------------------------------------------------------------------
?>
Decompress the swf file:
// Configure //----------------------------------------------------------------------------------------------------
// File name
$ Filename = "test.swf ";
// Open the file
$ Rs = fopen ($ filename, "r ");
// Read the file data
$ Str = fread ($ rs, filesize ($ filename ));
// Set the swf header file
$ Head = substr ($ str, 1, 8 );
$ Head = "F". $ head;
// Obtain the swf File Content
$ Body = substr ($ str, 8 );
// Decompress the File Content
$ Body = gzuncompress ($ body );
// Merge the file header and content
$ Str = $ head. $ body;
// Close the Read File stream
Fclose ($ rs );
// Create a new file
$ Ws = fopen ("create.swf", "w ");
// Write an object
Fwrite ($ ws, $ str );
// Close file retention
Fclose ($ ws );
// Configure //----------------------------------------------------------------------------------------------------
?>
How is it? Is it easy? Haha, php not only gives us simple "'