Unable to copy image from URL in PHP with upload class - php

Question

I'm trying to make a upload class with PHP. so this is my first PHP class:
//Create Class
class Upload{
//Remote Image Upload
function Remote($Image){
$Content = file_get_contents($Image);
if(copy($Content, '/test/sdfsdfd.jpg')){
return "UPLOADED";
}else{
return "ERROR";
}
}
}
and usage:
$Upload = new Upload();
echo $Upload->Remote('https://www.gstatic.com/webp/gallery/4.sm.jpg');
problem is, this class is not working. where is the problem? I'm new with PHP classes and trying to learn it.
thank you.

Answer 1

copy expects filesystem paths, e.g.
copy('/path/to/source', '/path/to/destination');
You're passing in the literal image you fetched, so it's going to be
copy('massive pile of binary garbage that will be treated as a filename', '/path/to/destination');
You want
file_put_contents('/test/sdfsdfg.jpg', $Content);
instead.

Answer 2

PHP's copy() function is used for copying files that you have permission to copy.
Since you're getting the contents of the file first, you could use fwrite().
<?php
//Remote Image Upload
function Remote($Image){
$Content = file_get_contents($Image);
// Create the file
if (!$fp = fopen('img.png', 'w')) {
echo "Failed to create image file.";
}
// Add the contents
if (fwrite($fp, $Content) === false) {
echo "Failed to write image file contents.";
}
fclose($fp);
}

Answer 3

Since you want to download a image, you could also use the imagejpeg-method of php to ensure you do not end up with any corrupted file format afterwards (http://de2.php.net/manual/en/function.imagejpeg.php):
download the target as "String"
create a image resource out of it.
save it as jpeg, using the proper method:
inside your method:
$content = file_get_contents($Image);
$img = imagecreatefromstring($content);
return imagejpeg($img, "Path/to/targetFile");
In order to have file_get_contents working correctly you need to ensure that allow_url_fopen is set to 1 in your php ini: http://php.net/manual/en/filesystem.configuration.php
Most managed hosters disable this by default. Either contact the support therefore or if they will not enable allow_url_fopen, you need to use another attempt, for example using cURL for file download. http://php.net/manual/en/book.curl.php
U can use the following snippet to check whether its enabled or not:
if ( ini_get('allow_url_fopen') ) {
echo "Enabled";
} else{
echo "Disabled";
}

Answer 4

What you describe is more download (to the server) then upload. stream_copy_to_stream.
class Remote
{
public static function download($in, $out)
{
$src = fopen($in, "r");
if (!$src) {
return 0;
}
$dest = fopen($out, "w");
if (!$dest) {
return 0;
}
$bytes = stream_copy_to_stream($src, $dest);
fclose($src); fclose($dest);
return $bytes;
}
}
$remote = 'https://www.gstatic.com/webp/gallery/4.sm.jpg';
$local = __DIR__ . '/test/sdfsdfd.jpg';
echo (Remote::download($remote, $local) > 0 ? "OK" : "ERROR");