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View Full Version : ftp via php script check if file exist before uploading proce



charbsk
08-14-2007, 07:24 AM
I wrote a PHP script that allows users to upload files to a FTP Server, the script works perfectly fine and files get uploaded with no problem. The issue i'm having is checking if the same file already exist on the server, when i upload the same file, it starts to upload and then returns with the error message and doesn't upload to the server like I want it to. My question is if there is a way to check before the upload process begins instead of wasting time and having to come back with the error message:

The problem I believe is at this point in the code:

$contents = ftp_nlist($Connect, ".");

if (is_array($contents))
{
if (in_array("$Filename", $contents))
{
echo "The file <font color='red'>$Filename</font> already exists on server<br>";
exit;
}
}
$upload = ftp_put($Connect, $destination_file, $file, FTP_BINARY);

Full PHP Code:


<?php

// FTP Configuration
$FTP_User = "$username";
$FTP_Pass = "$password";
$FTP_Host = "###";
$FTP_Root = "$dir";

// If the form was submitted
if (isset($action) && $action == "submit")
{

if ($dir == "-1")
{
echo "Error: Please choose a File Type to upload";
exit;
}

// Connect to the ftp address
$Connect = ftp_connect($FTP_Host);

if (!$Connect)
{
echo "Error: Could not connect to ftp server<br>";
exit;
}

echo "Connected to $FTP_Host<br>";

// Login
$login = ftp_login($Connect, $FTP_User, $FTP_Pass);

if (!$login)
{
echo "Error: Could not log on as $FTP_User<br>";
ftp_quit($Connect);
exit;
}

echo "Logged in as $FTP_User<br>";

//Turns passive mode on
$passive = ftp_pasv ($Connect, true );

/*
if (!passive){
echo "Failed to enter passive mode.<br>";
}
else {
echo "Entered passive mode.<br>";
}*/

if (ftp_chdir($Connect, "$FTP_Root"))
{
echo "Current directory is now: " . ftp_pwd($Connect) . "<br>";
}
else echo "Cannot change directory";

// Set the filename to be uploaded
$Filename = $_FILES['File_1']['name'];
$myFile = $_FILES['File_1'];
$destination_file = $FTP_ROOT.$_FILES['File_1']['name'];

// Set the local resource (the file that will be uploaded)
$file = $myFile['tmp_name'];

$contents = ftp_nlist($Connect, ".");

if (is_array($contents))
{
if (in_array("$Filename", $contents))
{
echo "The file <font color='red'>$Filename</font> already exists on server<br>";
ftp_close($Connect);
exit;
}
}
$upload = ftp_put($Connect, $destination_file, $file, FTP_BINARY);

if (!$upload)
{
// Show success message
echo "There was a problem uploading $Filename<BR>";
}
else
{
// Else show error message
echo "Successfully uploaded $Filename<BR>";

}

$contents = ftp_nlist($Connect, ".");

if (in_array("$Filename", $contents))
{
echo "The File $Filename exists<br>";
}
else
{
echo "The File $Filename does not exist<br>";
}

ftp_close($Connect);
}

?>



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