INTERVIEW QUESTIONS PROGRAMMING LANGUAGES PHP DETAILS

Question: How do download in php ?

Answer: It is very simple,


just give the link to the file that we want to download, if it is an html file, will display and other files get downloaded. [ Server Side Scripting files not get downloaded ].

It is very simple,


just give the link to the file that we want to download, if it is an html file, will display and other files get downloaded. [ Server Side Scripting files not get downloaded ]. Source: CoolInterview.com

We can Implement the download a file program by twodays
1)read a file with fopen and give the path of that file.
2)by using header function like
ex:To download .doc file
header('content-tye:text/doc')
header('Content-Disposition: attachment; filename="downloaded.doc"');
header("Cache-Control: no-cache, must-revalidate"); // HTTP/1.1
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT"); Source: CoolInterview.com

The answer is through header.

header('Content-type: application/image');

header('Content-Disposition: attachment; filename="myimg.jpg"');

readfile('myimg.jpg'); Source: CoolInterview.com

<?php
ob_start();
require('connect.php');//connection to the database
$id=$_GET['userId'];
$result=mysql_query("select file_name, file_type from table_name where user_id='$id'");
$row=mysql_fetch_array($result);
$fn=$row['file_name'];
$ft=$row['file_type'];
$path="uploads/photos/$id";

header("Content-Disposition: attachment; filename=$fn");


header("Content-
Type:application/$ft");

header("Content-Length: ".filesize("$path/$fn"));
header("Pragma: no-cache");
header("Expires: 0");
$fp=fopen("$path/$fn","r");
print fread($fp,filesize("$path/$fn"));
fclose($fp);
exit();

ob_end_flush();

?>
Source: CoolInterview.com

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