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Homephp教程php手册使用php的zlib压缩和解压缩swf文件

  我在以前写过怎么使用c#来压缩和解压缩swf文件,解压缩,压缩和读取flash头文件信息需要使用一个开源的链接库,而且使用起来也不是很方便,但是使用php就不一样了,php包含了zlib的链接库,可以直接使用其相关功能,下面是我写的压缩和结压缩swf文件的例子:

//没有加入判断swf文件是否已经压缩,入需要可以根据文件的第一个字节是'F'或者'C'来判断


压缩swf文件:

//--------------------------------------------------------------------------------------------------
//文件名
$filename = "test.swf";
//打开文件
$rs = fopen($filename,"r");
//读取文件的数据
$str = fread($rs,filesize($filename));
//设置swf头文件
$head = substr($str,1,8);
$head = "C".$head;
//获取swf文件内容
$body = substr($str,8);
//压缩文件内容,使用最高压缩级别9
$body = gzcompress($body, 9);
//合并文件头和内容
$str = $head.$body;
//关闭读取的文件流
fclose($rs);
//创建一个新的文件
$ws = fopen("create.swf","w");
//写文件
fwrite($ws,$str);
//关闭文件留
fclose($ws);
//----------------------------------------------------------------------------------------------------
?>

解压缩swf文件:

//----------------------------------------------------------------------------------------------------
//文件名
$filename = "test.swf";
//打开文件
$rs = fopen($filename,"r");
//读取文件的数据
$str = fread($rs,filesize($filename));
//设置swf头文件
$head = substr($str,1,8);
$head = "F".$head;
//获取swf文件内容
$body = substr($str,8);
//解压缩文件内容
$body = gzuncompress($body);
//合并文件头和内容
$str = $head.$body;
//关闭读取的文件流
fclose($rs);
//创建一个新的文件
$ws = fopen("create.swf","w");
//写文件
fwrite($ws,$str);
//关闭文件留
fclose($ws);
//----------------------------------------------------------------------------------------------------
?>


怎么样?是不是很简单?呵呵,php给我们的不止是简单...



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