PhP ftp_put function limitation?

I am working on a solution where I need to upload 33,000 or more csv files to a server.

My script works fine for 25,000 files, but then it sometimes breaks after downloading 26,000 files, or sometimes 27,000 files, etc. with the following PHP warning. ie

PHP Warning: ftp_put (): bind () failed: address is already in use (98)

I investigated this error over the Internet, but did not find a solution, so I post it here.

I checked directory no. file limit on an Ubuntu 14.0.4 LTS server with ext4 file system and can't find anything, which limits uploading 33,000 files to one directory.

I tried to upload the same 33,000 files to upload in two different directories i.e. 20,000 to DirA and left 13,000 in DirB but after 5,000 successful files transferred to DirB it stops and gives the above error.

Here is the basic code I am using to download files as a ie link

    $dpath = "/var/www/data/";
    $sourceDir = $dpath .'test1';
    $remoteDir = 'test2';

    $serverIp = "192.168.0.1";
    $user = "dataexport";
    $pass = "abc";

    $connHandle = ftp_connect($serverIp);
    if($connHandle)
    {
        $loginFlag = ftp_login($connHandle, $user, $pass) or   die('couldnt connect to $serverIp');

        if($loginFlag)
        {
            if(is_dir($sourceDir))
            {
                $dirHandle = opendir($sourceDir);

                if($dirHandle)
                {
                    while(($file = readdir($dirHandle)) !== false)
                    {
                        if($file != "." && $file != "..")
                        {
                            if(is_dir($sourceDir.'/'.$file))
                            {
                               // code for copying directory.. I am not using it.
                            }
                            else
                            {
                               $srcFilePath = $sourceDir.'/'.$file;
                               $desFilePath = $remoteDir.'/'.$file;

                                if(ftp_put($connHandle, $desFilePath, $srcFilePath, FTP_ASCII))
                                {
                                    echo "Copied Successfully to path: $desFilePath \n";
                                }
                                else 
                                {
                                    echo "Copying failed \n"; die();
                                }
                            }
                        }
                    }

                    closedir($dirHandle);
                }
            }
            else 
            {
                echo "Not a valid directory <br />\n";
            }
        }
        else
        {
            echo "Wrong Credentials for the server with IP = $loginFlag <br />\n";
        }
    }
    else 
    {
        echo "Unable to connect to server with IP = $serverIp <br />\n";
    }

    ftp_close($connHandle);
}

      

        
        
        
      

    

NOTE. I changed my real code to keep it simple and not tested, maybe it will require some testing. But I get an error on the next line of code after successfully migrating 25,000 files. those.

ftp_put ($ connHandle, $ desFilePath, $ srcFilePath, FTP_ASCII)

I tried to upload a file with "FTP_BINARY" option but didn't work.

Look for the right advice. Thanks in advance.

Greetings