header( "Pragma: public" );
header( "Expires: 0" ); // set expiration time
header( "Cache-Component: must-revalidate, post-check=0, pre-check=0" );
header( "Content-type:".$this->mineType );
header( "Content-Length: " . filesize( $this->filename ) );
header( "Content-Disposition: attachment; filename="$fn"" );
header( 'Content-Transfer-Encoding: binary' );
readfile( $this->filename );
header( "Expires: 0" ); // set expiration time
header( "Cache-Component: must-revalidate, post-check=0, pre-check=0" );
header( "Content-type:".$this->mineType );
header( "Content-Length: " . filesize( $this->filename ) );
header( "Content-Disposition: attachment; filename="$fn"" );
header( 'Content-Transfer-Encoding: binary' );
readfile( $this->filename );
第4条是指定这个文件的类型的,一般的网页就是text/html。图片是image/jpg等,可以使用标准的类型或自定义
第5条是说明这文件的长度为(字节)
第6条是说明这文件下载的话默认存为什么名称
第7条是说明这是个二进制文件第8行读取并显示文件正文