一个PHP文件下载类-创新互联
class downLoad{
var $file_name;
var $file_dir;
var $buffer_size = 1024;
var $err = "";
public static $MIME_type = array(
"pdf" =>"application/pdf",
"exe" =>"application/octet-stream",
"zip" =>"application/zip",
"doc" =>"application/msword",
"xls" =>"application/vnd.ms-excel",
"ppt" =>"application/vnd.ms-powerpoint",
"gif" =>"p_w_picpath/gif",
"png" =>"p_w_picpath/png",
"jpeg" =>"jpg",
"mp3" =>"audio/mpeg",
"wav" =>"audio/x-wav",
"mpeg" =>"mpg",
"mpe" =>"video/mpeg",
"mov" =>"video/quicktime",
"avi" =>"video/x-msvideo",
);
public function __construct($file_dir="",$file_name=""){
$this->file_dir = $file_dir;
$this->file_name = $file_name;
$this->path = $file_dir."/".$file_name;
$this->suffix = pathinfo($file_name,PATHINFO_EXTENSION);
}
public function down(){
if(!file_exists($this->path)){
$this->err = "该文件被移除了";
return false;
}
$content_type = $this->getMIME($this->suffix);
$file_size = filesize($this->path);
header("Content-type: ".$content_type);
header('Content-Disposition: p_w_upload; filename="'.$this->file_name.'"');
@header("Cache-control: public");
@header("Pragma: public");
header("Content-Length: ".$file_size);
ob_end_clean();
//readfile($this->path); 一次性读出来
$fp= fopen($this->path,"r");
$buffer_size = $this->buffer_size;
$cur_pos = 0; //记录读了多少了
while(!feof($fp) && $file_size>$buffer_size+$cur_pos){
$buffer = fread($fp,$buffer_size); //每次读1024字节
echo $buffer;
$cur_pos += $buffer_size;
}
//把剩下的读出来 因为文件的带下很有很能不是1024 的整数倍
$buffer = fread($fp,$file_size-$cur_pos);
echo $buffer;
fclose($fp);
return true;
}
public function getMIME($key=""){
if($key == "" || !isset(self::$MIME_type[$key])){
return "application/octet-stream";
}
return self::$MIME_type[$key];
}
}
// $x = new downLoad($file_dir,$file_name); $file_dir路径 比如 all $file_name文件名 比如 a.exe 合起来就是全部的路径了all/a.exe
// $x->down();
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网站栏目：一个PHP文件下载类-创新互联
URL分享：http://myzitong.com/article/ccesco.html