PHP download file source code (force download of any file format)_PHP tutorial

A simple php file downloads the source code. Although it does not support breakpoint resumption, etc., it can meet some common needs. PHP downloading files can actually be achieved with an a tag, such as magento-1.8.1.0.zip. But if you encounter some formats that the browser can recognize, such as .txt, .html, .pdf, etc., then use abc.txt I guess you know what will happen. What's up.

Copy code The code is as follows:

/**
* File download
*
**/
header("Content-type:text/html;charset=utf-8");
download('web/magento-1.8.1.0.zip', 'magento download');
function download($file , $down_name){
$suffix = substr($file,strrpos($file,'.')); //Get the file suffix
$down_name = $down_name.$suffix; //New file name, It’s the name after downloading

//Judge whether the given file exists
if(!file_exists($file)){
die("The file you want to download no longer exists, it may have been deleted");
}
$fp = fopen($file,"r");
$file_size = filesize($file);
//Headers needed to download files
header("Content- type: application/octet-stream");
header("Accept-Ranges: bytes");
header("Accept-Length:".$file_size);
header("Content-Disposition: attachment; filename=".$down_name);
$buffer = 1024;
$file_count = 0;
//Return data to the browser
while(!feof($fp) && $file_count < $file_size){
$file_con = fread($fp,$buffer);
$file_count += $buffer;
echo $file_con;
}
fclose($fp) ;
}
?>

Source code for PHP mandatory file download

Provide users with mandatory file download functionality.

Copy code The code is as follows:

/********************
*@file - path to file
*/
function force_download($file)
{
if ((isset($file))&&(file_exists($file))) {
header("Content-length: ".filesize($file));
header(' Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="' . $file . '"');
readfile("$file");
} else {
echo "No file selected";
}
}

You will definitely laugh at me. Is it worth saying that "downloading files" is so simple? Of course it's not as simple as imagined. For example, if you want customers to fill out a form before they can download a certain file, your first idea must be to use the "Redirect" method. First check whether the form has been filled in and complete, and then point the URL to the file. , so that customers can download it, but if you want to make an e-commerce website about "online shopping" and consider security issues, you don't want users to directly copy the URL to download the file. The author recommends that you use PHP to directly read the actual file and then download it. method to do it. The procedure is as follows:

Copy code The code is as follows:

$file_name = "info_check.exe";
$file_dir = "/public /www/download/";
if (!file_exists($file_dir . $file_name)) { //Check whether the file exists
echo "File not found";
exit;
} else {
$file = fopen($file_dir . $file_name,"r"); // Open the file
// Enter the file tag
Header("Content-type: application/octet-stream");
Header("Accept-Ranges: bytes");
Header("Accept-Length: ".filesize($file_dir . $file_name));
Header("Content-Disposition: attachment; filename= " . $file_name);
//Output file content
echo fread($file,filesize($file_dir . $file_name));
fclose($file);
exit;
}

If the file path is an "http" or "ftp" URL, the source code will change slightly. The procedure is as follows:

Copy code The code is as follows:

$file_name = "info_check.exe";
$file_dir = "http: //www.jb51.net/";
$file = @ fopen($file_dir . $file_name,"r");
if (!$file) {
echo "File not found" ;
} else {
Header("Content-type: application/octet-stream");
Header("Content-Disposition: attachment; filename=" . $file_name);
while ( !feof ($file)) {
echo fread($file,50000);
}
fclose ($file);
}

In this way, you can directly output the file using PHP.

However, be sure to note: Header information is equivalent to first browsing the file information at high speed, and then downloading the information on the browser to the attachment. Therefore, if you are in an MVC-mode application, the view page must not have any content. Otherwise, the relevant content of the view page will be downloaded together with the content of the file, resulting in the downloaded file being unusable.

Here is my program:

Copy code The code is as follows:

public function downloadAction()
{
if (isset($_GET ['mriID']))
{
$this->view->mriID=(get_magic_quotes_gpc())?$_GET['mriID']:addslashes($_GET['mriID']);
}
if (isset($_GET['dicomID']))
{
$this->view->dicomID=(get_magic_quotes_gpc())?$_GET['dicomID' ]:addslashes($_GET['dicomID']);
}
if (isset($_GET['JPGID']))
{
$this->view->JPGID =(get_magic_quotes_gpc())?$_GET['JPGID']:addslashes($_GET['JPGID']);
}
$dicomfile=new dicomfile();
$jpgfile=new jpgfile( );
$mri=new mri();
if($this->view->dicomID)
{
$filename=$dicomfile->find($this-> ;view->dicomID)->toArray();
$filename=$filename[0]['filename'];
}
else if($this->view-> JPGID)
{
$filename=$jpgfile->find($this->view->JPGID)->toArray();
$filename=$filename[0][' JPGname'];
}
$dir=$mri->find($this->view->mriID)->toArray();
$dir=$dir[0] ['dicom_path'];
$file=$dir.'/'.$filename;
if (!file_exists($file))
{
echo "the file does not exist!" ;
exit();
}
$file_size=filesize($file);
header("Content-type: application/octet-stream");
header("Accept- Ranges: bytes");
header("Accept-Length:". $file_size);
header("Content-Disposition: attachment; filename=".$filename);
$fp=fopen( $file,"r");
if (!$fp)
echo "can't open file!";
$buffer_size=1024;
$cur_pos=0;
while (!feof($fp)&&$file_size-$cur_pos>$buffer_size)
{
$buffer=fread($fp,$buffer_size);
echo $buffer;
$cur_pos+=$ buffer_size;
}
$buffer=fread($fp,$file_size-$cur_pos);
echo $buffer;
fclose($fp);
}

At this point, the download.phtml page must be completely blank. MUST NOT have any content (including static information like:



) Otherwise, this information will be downloaded to the download file , causing the file to become unusable.

http://www.bkjia.com/PHPjc/767608.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/767608.htmlTechArticleA simple php file download source code, although it does not support breakpoint resuming, etc., but it can meet some common requirements Needed. Downloading files in php can actually be done with an a tag, such as a hr...