PHP: How to Save Image From Web (Remote Image)

$remoteFile can be a link to any file, not only an image.

Please keep in mind that $localFile should have same extension as $remoteFile.

<?
$remoteFile='http://chart.apis.google.com/chart?chs=150x150&cht=qr&chld=L|0&chl=http://superiorwebsys.com';
$localFile=$_SERVER['DOCUMENT_ROOT'].'/tmp/image2.png';
saveFileFromTheWeb($remoteFile,$localFile);
function saveFileFromTheWeb($remoteFile,$localFile){
   $ch = curl_init();
   $timeout = 0;
   curl_setopt ($ch, CURLOPT_URL, $remoteFile);
   curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
   curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
   curl_setopt($ch, CURLOPT_BINARYTRANSFER, 1);
   $image = curl_exec($ch);
   curl_close($ch);
   $f = fopen($localFile, 'w');
   fwrite($f, $image);
   fclose($f);
}
?>

Thanks to rgnelson for the question asked here: Generate QR Code with PHP Using Google API