Uploading a file from url - php

Question

Hello guys :) how can i upload a file from an url ? (i read a lot of questions talking of this but nothing its working ...) here is my code :
$url = 'https://www.google.com/images/branding/googlelogo/1x/googlelogo_color_272x92dp.png';
$file = file_get_contents($url);
if ($file != NULL) {
$fileName = md5(uniqid()) . '.' . $file->guessExtension();
$file->move(
$this->getParameter('image_directory'), $fileName
);
}
Here i just want to download the image from url and move it to a directory (i will save the path in the database after), but with this code i have this error :
Call to a member function guessExtension() on string

Answer 1

This simple code will download and save the image to a file
<?php
$url = 'https://www.google.com/images/branding/googlelogo/1x/googlelogo_color_272x92dp.png';
$file = file_get_contents($url);
if ($file != NULL) {
$pathToFolder = 'images/png/'; // just an example folder location
$fileName = $pathToFolder . md5(uniqid()) . 'png';
file_put_contents($fileName,$file);
} else {
echo 'File downlaod error';
}

Answer 2

file_get_contents is to read the content of a file (txt, xml, etc).
Instead, you should use linux command wget. You can run it with PHP function exec.
$url = 'https://www.google.com/images/branding/googlelogo/1x/googlelogo_color_272x92dp.png';
//Execute wget
$file=exec("wget http://www.example.com/file.xml");
if ($file != NULL) {
$fileName=md5(uniqid()).'.'.$file->guessExtension();
$file->move($this->getParameter('image_directory'), $fileName);
}