php 远程大文件

<?php
$remoteFile = 'http://example.com/largefile.zip';
$localFile = 'largefile.zip';

$fp = fopen($localFile, 'w');
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $remoteFile);
curl_setopt($ch, CURLOPT_FILE, $fp);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_exec($ch);
curl_close($ch);
fclose($fp);
?>

<?php
$localFile = 'largefile.zip';
$remoteFile = 'http://example.com/upload.php';

$fp = fopen($localFile, 'r');
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $remoteFile);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, fread($fp, filesize($localFile)));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_exec($ch);
curl_close($ch);
fclose($fp);
?>