download file from a folder using php
<p>I need to download csv file from <code>export</code> folder which is inside the <code>www</code> folder.<br>
I could make it as link, but by attempting to save as the csv files, an empty csv file will be downloaded. Any idea?</p>

<pre><code>&lt;?php
$dir_open = opendir('./export');

while(false !== ($filename = readdir($dir_open))){
if($filename != "." &amp;&amp; $filename != ".."){
    $link = "&lt;a href='./$filename'&gt; $filename &lt;/a&gt;&lt;br /&gt;";

    echo $link;
}
}
closedir($dir_open);
?&gt;
</code></pre>

<p>the result links are like:<br>
<a href="https://i.stack.imgur.com/ZAHm5.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ZAHm5.jpg" alt="enter image description here"></a></p>

<p>by right clicking and selecting save link as, an empty csv file is downloaded</p>