About the implementation of PHP remote download function

How does PHP implement remote download function? This article mainly introduces the method of downloading files from remote using PHP, and involves the skills of operating files in PHP. I hope it will be helpful to everyone.

The specific implementation method is as follows:

<?php
if ($_GET[xfer]) {
if ($_POST[from] == "") {
print "You forgot to enter a url.";
} else {
copy("$_POST[from]", "$_POST[to]");
$size = round((filesize($_POST[to])/1000000), 3);
print "transfer complete.<br>
<a><a href=\"$_POST[from]\">$_POST[from]</a><br>
<a><a href=\"$_POST[to]\">$_POST[to]</a> : $size MB";
}
} else {
print "<form action=\"$PHP_SELF?xfer=true\" method=post>
from(http://): <input name=from><br>
to(filename): <input name=to><br>
<input type=submit value=\"transload\">";
}
?>

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