How to make sure file saved by using cURL - php

Question

<?php
$source = 'http://www.xxx.com/1.jpg';
$fileBody = date('YmdHis') . rand(1000, 9999);
$extension = pathinfo($source, PATHINFO_EXTENSION);
$fileName = $fileBody . '.' . $extension;
$ch = curl_init($source);
$fp = fopen($path . $fileName, 'wb');
curl_setopt($ch, CURLOPT_FILE, $fp);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_exec($ch);
curl_close($ch);
fclose($fp);
clearstatcache();
return $fileName;
This is how I grab image from internet, the image saved successfully and I will return file name for ajax to make immediately thumbnail, but sometimes php return the $fileName when it still processing download, therefore JavaScript reveal empty image on the page, how response after the file indeed been download.

Answer 1

curl_exec returns true on success and false on failure. Use that information.
Also, You can check curl_getinfo to make sure the transfer completed successfully and was not empty. (You get http_code there for example, as well as content_type and size_download).

Answer 2

$downComplete = false;
while(!$downComplete)
{
if(!file_exist($filePath))
{
sleep(1);
}
else
{
$downComplete = true;
break;
}
}
Hi,Above is an idea for check if file is completely downloaded,i think it's useful,
main idea is check saved file all the time until its finished download,then you can
display the img to front end..you can add it after your curl code,i didn't run it
myself,so just an idea..