How to echo date in php - php

Question

this code is doing Zip & Download perfect but i want to change a time to date how can i do this
when i save a folder its save with time i want to save with date how can i do this
this is time script how can i change in to date when i change Y-m-d but this is not working its showing this error Parse error: syntax error, unexpected T_STRING in downloadlist.php on line 26
please help me to fix this issue
thanks
$filename = Y-m-d " Backup.zip"; (not working)
$filename = time() ." Backup.zip"; ( working code)
downloadlist.php
<?php
// function download($file) downloads file provided in $file
function download($file) {
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.basename($file));
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
ob_clean();
flush();
readfile($file);
exit;
}
$files = $_POST['file'];
if(empty($files))
{
echo("You haven't selected any file to download.");
}
else
{
$zip = new ZipArchive();
$filename = time() ." Backup.zip"; //adds timestamp to zip archive so every file has unique filename
if ($zip->open($filename, ZIPARCHIVE::CREATE)!==TRUE) { // creates new zip archive
exit("Cannot open <$filename>\n");
}
$N = count($files);
for($i=0; $i < $N; $i++)
{
$zip->addFile($files[$i], $files[$i]); //add files to archive
}
$numFiles = $zip->numFiles;
$zip->close();
$time = 8; //how long in seconds do we wait for files to be archived.
$found = false;
for($i=0; $i<$time; $i++){
if($numFiles == $N){ // check if number of files in zip archive equals number of checked files
download($filename);
$found = true;
break;
}
sleep(1); // if not found wait one second before continue looping
}
if($found) { }
else echo "Sorry, this is taking too long";
}
?>
list.php
<?php
function listDir($dirName)
{
$forbidden_files=array('.htaccess','.htpasswd');
$allow_ext=array('.pdf','.doc','.docx','.xls','.xlsx','.txt');
?><form name="filelist" action="downloadList.php" method="POST"><?php echo "\n";
if ($handle = opendir($dirName)) {
while (false !== ($file = readdir($handle)) ) {
$allowed=(strpos($file,'.')!==false && in_array(substr($file,strpos($file,'.')) ,$allow_ext ));
if ($file != "." && $file != ".." && $allowed ) { ?> <input type=checkbox name="file[]" value="<?php echo "$file";?>"><?php echo "$file"; ?><br><?php echo "\n";
}
}
closedir($handle);
}
?><br><input type="submit" name="formSubmit" value="Zip and download" /></form><?php
}
listDir('.'); ?>

Answer 1

$filename = Y-m-d " Backup.zip"; (not working)
because you are not using date() here. Also, you are not concatenating strings using ..
$filename = date('Y-m-d')."Backup.zip";
The above code will work for you.