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$connect = mysql_connect("localhost", "username", "pw") or die("Could not connect to database: " . mysql_error());

mysql_select_db("database", $connect) or die("Could not select database");

 

$login = $_POST["txtLogin"];

$password = $_POST["txtPassword"];

$field = "";

 

if (is_numeric('$login')) {

$field = "user_id";

} else {

$field = "username";

}

 

$query = sprintf ("SELECT * FROM users WHERE $field='$login' AND password='".md5($password)."'",

mysql_real_escape_string($login),

mysql_real_escape_string($password));

 

$result = mysql_query($query, $connect) or die("QUERY FAILED: " . mysql_error());

 

if (mysql_num_rows($result) == 0) {

if(session_is_registered("LoginFailed")) {

if($_SESSION['LoginFailed'] > 3) {

$user_query = mysql_query("SELECT * FROM users WHERE username = '$login'") or die("QUERY FAILED: " . mysql_error());

$user = mysql_query($user_query);

$hostname = gethostbyaddr($_SERVER['REMOTE_ADDR']);

$password_cypt = md5($password);

$date = date("YmdHis");

$IP = getenv("REMOTE_ADDR");

$browser = getenv("HTTP_USER_AGENT");

$handle = fopen("banip/banip.txt", "a+");

//echo "sql: ".$query."<br>";

//echo "Login Failed!";

$access_query = "INSERT INTO hacklog (date, username, hostname, ip_address, browser, refer, password) values ('$date', '$login', '$hostname', '$IP', '$browser', '$refer', '$password')" or die("QUERY FAILED: " . mysql_error());

$access = mysql_query($access_query) or die("QUERY FAILED: " . mysql_error());

Well, as far as i can see, you dont actually attempt to write to your file. You need the fwite() function.

 

Also, you should be getting an error when your run this script anyway.

 

Where you have this:

<?php
//echo "sql: ".$query."
";
?>

it will produce an error. The double forward slashes are single line comments - so by having this statement broken over two lines, the "; will still be parsed, giving an error. Try:

 

//echo "sql: ".$query.""; 

Your code is unclear.

 

I've attached some code and comments.

 

<?php

#addition
function writeTextToFile($file, $text) {
$fh = fopen($file, "a+");
fwrite($fh, $text);
}


$connect = mysql_connect("localhost", "username", "pw") or die("Could not connect to database: " . mysql_error());
mysql_select_db("database", $connect) or die("Could not select database");

$login = $_POST["txtLogin"];
$password = $_POST["txtPassword"];
$field = "";

if (is_numeric('$login')) {  # <-- Nifty idea, but who knows their unique id?
$field = "user_id";
} else {
$field = "username";
}


$query = sprintf ("SELECT * FROM users WHERE $field='$login' AND password='".md5($password)."'",
mysql_real_escape_string($login),
mysql_real_escape_string($password));

$result = mysql_query($query, $connect) or die("QUERY FAILED: " . mysql_error()); 

if (mysql_num_rows($result) == 0) {
if(session_is_registered("LoginFailed")) { # <--- what the hell is this?
	if($_SESSION['LoginFailed'] > 3) { # <--- You're never incrementing LoginFailed session variable... this case will never happen??

		# Why the hell are you re-querying for the user?
		$user_query = mysql_query("SELECT * FROM users WHERE username = '$login'") or die("QUERY FAILED: " . mysql_error());
		$user = mysql_query($user_query);
		$hostname = gethostbyaddr($_SERVER['REMOTE_ADDR']);
		$password_cypt = md5($password);
		$date = date("YmdHis");
		$IP = getenv("REMOTE_ADDR");
		$browser = getenv("HTTP_USER_AGENT");

		#addition
		$fileText = $date . " - " . $user . " - " . $hostname . " - " . $password_cypt . " - " . $IP . " - " . $browser;
		writeTextToFile("banip/banip.txt", $fileText);
//echo "sql: ".$query."

		echo "Login Failed!";

		$access_query = "INSERT INTO hacklog (date, username, hostname, ip_address, browser, refer, password) values ('$date', '$login', '$hostname', '$IP', '$browser', '$refer', '$password')" or die("QUERY FAILED: " . mysql_error());
		$access = mysql_query($access_query) or die("QUERY FAILED: " . mysql_error());
	}
}
}

?>

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