如何使用ftp连接通过PHP cURL上传文件？

我使用这个脚本通过curl函数和ftp连接上传我的文件

在本地，它可以正常工作，但在我的服务器上，文件似乎已上载，但文件大小为零

怎么了？多谢各位

$ch = curl_init();
$localfile = (dirname(__FILE__).'/asset/myfile.zip');
$fp = fopen($localfile, 'r');
curl_setopt($ch, CURLOPT_URL, "ftp://$user_name:$user_pass@$server/".'myfile.zip');
curl_setopt($ch, CURLOPT_UPLOAD, 1);
curl_setopt($ch, CURLOPT_INFILE, $fp);
curl_setopt($ch, CURLOPT_INFILESIZE, filesize($localfile));
curl_exec ($ch);
curl_close ($ch);

以及如何在此脚本中上载多个文件，如：

$localfile1 = (dirname(__FILE__).'/asset/myfile1.zip');
$localfile2 = (dirname(__FILE__).'/asset/myfile2.zip');
$localfile3 = (dirname(__FILE__).'/asset/myfile3.zip');

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这个来源可能会帮助你解决问题

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此来源可能有助于解决您的问题

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要在curl中上载文件，可以使用。请尝试以下方法：

$localfile = (dirname(__FILE__).'/asset/myfile.zip');
$curl_file = curl_file_create($localfile,'zip');
$params = ['file' => $curl_file];

$ch = curl_init();
$localfile = (dirname(__FILE__).'/asset/myfile.zip');
$fp = fopen($localfile, 'r');
curl_setopt($ch, CURLOPT_URL, "ftp://$user_name:$user_pass@$server/".'myfile.zip');
curl_setopt($ch, CURLOPT_UPLOAD, 1);
//curl_setopt($ch, CURLOPT_INFILE, $fp);
curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
curl_setopt($ch, CURLOPT_INFILESIZE, filesize($localfile));
curl_exec ($ch);
curl_close ($ch);

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要以curl格式上载文件，可以使用。请尝试以下方法：

$localfile = (dirname(__FILE__).'/asset/myfile.zip');
$curl_file = curl_file_create($localfile,'zip');
$params = ['file' => $curl_file];

$ch = curl_init();
$localfile = (dirname(__FILE__).'/asset/myfile.zip');
$fp = fopen($localfile, 'r');
curl_setopt($ch, CURLOPT_URL, "ftp://$user_name:$user_pass@$server/".'myfile.zip');
curl_setopt($ch, CURLOPT_UPLOAD, 1);
//curl_setopt($ch, CURLOPT_INFILE, $fp);
curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
curl_setopt($ch, CURLOPT_INFILESIZE, filesize($localfile));
curl_exec ($ch);
curl_close ($ch);