Create ZIP Files with PHP

<?php
// increase script execution time if necessary
ini_set("max_execution_time", 10000);

if($_POST["zip_file_now"]=="1")
{
$File_you_want_to_zip = $_POST["fileToZip"];

if($File_you_want_to_zip == "")
{
$zipped_file_creation_status = '<br><font style="font-family: helvetica, arial, 'lucida grande', sans-serif; font-size:12px;color:red;">Please select a file above to zip.</font>';
}
else
{
function Zip($source, $destination)
{
if (!extension_loaded('zip') || !file_exists($source))
{
return false;
}
$zip = new ZipArchive();
if (!$zip->open($destination, ZIPARCHIVE::CREATE))
{
return false;
}
$source = str_replace('\\', '/', realpath($source));
if (is_dir($source) === true)
{
$files = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($source), RecursiveIteratorIterator::SELF_FIRST);
foreach ($files as $file)
{
$file = str_replace('\\', '/', realpath($file));

if (is_dir($file) === true)
{
$zip->addEmptyDir(str_replace($source . '/', '', $file . '/'));
}
else if (is_file($file) === true)
{
$zip->addFromString(str_replace($source . '/', '', $file), file_get_contents($file));
}
}
}
else if (is_file($source) === true)
{
$zip->addFromString(basename($source), file_get_contents($source));
}
return $zip->close();
}

//if zipped successfully, return success message otherwise, return failure message
if(Zip($File_you_want_to_zip,'zipped files/'.date("d-m-Y").'_'.rand(123456,098765).'.zip'))
{
$zipped_file_creation_status = '<br><font style="font-family: helvetica, arial, 'lucida grande', sans-serif; font-size:12px;color:blue;">Zip file created successfully.</font>';
}
else
{
$zipped_file_creation_status = '<br><font style="font-family: helvetica, arial, 'lucida grande', sans-serif; font-size:12px;color:red;">Zip file creation was unsuccessful.</font>';
}
}
}

?>

<center>
<div id="vasp" style="">Create ZIP Files with PHP</div><br clear="all" /><br clear="all" />
<div style="width:600px;border:6px solid #F6F6F6; padding:10px;">
<div style=" float:left;width:250px; border:0px solid black; font-family: helvetica, arial, 'lucida grande', sans-serif; font-size:12px; line-height:22px;" align="left">
<b>ZIPPED FILES ARE SHOWN BELOW</b>
<?php

//Create a handler to read the directory contents
$handler = opendir("zipped files/");
$found = FALSE; // Used to see if there were any valid files
//Keep going until all files in directory have been read
while ($file = readdir($handler))
{
if (preg_match ("/.zip$/i", $file))
{
echo '<p align="left"><a href="zipped files/' . $file . '">' . $file . '</a></p>';
$found = true;
}
}
closedir($handler);
if ($found == FALSE) { echo "<br><p align='left'>No zipped files at the moment</p><br>"; }
else { }
?>
</div>
<form method="post" action="zip.php">
<div style=" float:left;width:250px;">
<?php
if($open_directory_to_read_its_content = opendir("."))
{
echo '<select name="fileToZip" id="fileToZip" style=" width:250px;font-family: helvetica, arial, 'lucida grande', sans-serif; font-size:12px;line-height:25px;padding:3px;">';
echo '<option value="">Please select a file to zip</option>';
while(($directory_contents = readdir($open_directory_to_read_its_content)) !== false)
{
if (preg_match ("/.zip$/i", $directory_contents))
{
//Don't show zipped files in this area
}
elseif(is_dir($directory_contents) && $directory_contents != "." && $directory_contents != "..")
{
echo '<option value="'.$directory_contents.'">'.$directory_contents.' is a directory</option>';
}
elseif(is_file($directory_contents))
{
echo '<option value="'.$directory_contents.'">'.$directory_contents.' is a file</option>';
}
}
closedir($open_directory_to_read_its_content);
}
echo '</select>'.$zipped_file_creation_status;
?>

</div>
<div style=" float:left;width:100px;">
<input type="submit" name="Submit" value="Submit" style="padding:3px; width:96px; cursor:pointer;" />
<input type="hidden" id="zip_file_now" name="zip_file_now" value="1" />
</div><br clear="all" />
</form>
</div><br clear="all" />
</center>