Need help to make this curl script multi links - php

Question

Here is the script it downloads files from url. The thing that I want is multi links like there should be three or more input url boxes in which user puts their links and the script downloads all the files. I don't want to press a button and another url box appear; that is not I want, I have already tried that. Or multi links; something like this where we can put links on each line:
<?php
class Download {
const URL_MAX_LENGTH=2000;
// clean url
protected function cleanUrl($url){
if (isset($url)){
if (!empty($url)){
if(strlen($url)< self::URL_MAX_LENGTH){
return strip_tags($url);
}
}
}
}
//is url
protected function isUrl($url){
$url=$this->cleanUrl($url);
if (isset($url)){
if (filter_var($url, FILTER_VALIDATE_URL, FILTER_FLAG_PATH_REQUIRED)){
return $url;
}
}
}
//return extension
protected function returnExtension($url){
if ($this->isUrl($url)){
$end = end(preg_split("/[.]+/", $url));
if (isset($end)){
return $end;
}
}
}
// file download
public function downloadFile($url){
if ($this->isUrl($url)){
$extension = $this->returnExtension($url);
if ($extension){
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$return = curl_exec($ch);
curl_close($ch);
// directory where files should be downloaded
$destination = "uploads/file.$extension";
$file = fopen($destination, "w+");
fputs($file, $return);
if (fclose($file)) {
echo "Successfully Download The File";
}
}
}
}
}
$obj = new Download();
if (isset($_POST['url'])) { $url = $_POST['url'];}
?>
<form action="index.php" method="post">
<input type="text" name="url" maxlength="2000">
<input type="submit" value="Download" />
</form>
<?php if (isset($url)) { $obj->downloadFile($url); }?>

Answer 1

Break string into array using \n as delimiter, you will get array of URLs. check below example to use explode.
Note: Use <textarea>, if you use input and press enter then form will get submitted.
<form action="" method="post">
<textarea type="text" name="url" maxlength="2000"></textarea>
<input type="submit" value="Download" />
</form>
<?php
if(isset($_POST['url'])){
$urls = explode("\n",$_POST['url']);
}
foreach ($urls as $url) {
echo $url;
//$obj->downloadFile($url);
}
?>