Php Code Error need help on this code

hello need a bit of help on this code, it give an 'insufficient units to send sms.'

<?include "igwt.php";include "mysql.php";include "../../api/smsapi.php";session_start(); $message = $_POST[message];$to = $_POST[receiver];$from = $_POST[from];/* if (strlen($to) == 10){$error[] = "You have to specify the country code, too. Eg. 13333333333";} */if ($_SESSION['username'] == ''){include "loginerror.php";die;exit;break;}$check = mysql_query("SELECT name, firstname, active, sms FROM users WHERE username = '$username'");$row = mysql_fetch_row($check); $_SESSION['name'] = $row[0];$_SESSION['firstname'] = $row[1]; $_SESSION['active'] = $row[2];$_SESSION['sms'] = $row[3];$_SESSION['username'] = $username;$left = $_SESSION['sms'];$on = $_SESSION['active']; // check the mobile number$atom = '[-a-z!#$%&\'*+/=?^_`{|}~]';if (eregi($atom, $to)) { $error[] = 'Invalid mobile phone number';}if ($left == '0'){$error[] = 'Not enough SMS credits to deliver this message.';}if (empty ($to)) {        	$error[] = 'You not specify destination address (TO)!';    	}if (empty ($from)) {    	    $error[] = 'You have not specified any sender id!';    	}if (strlen ($message) > 465) {			$error[] = 'Your message is too long';			}if ($on == 'no'){$error[] = 'Your account status is not active.';}if ((strlen ($message)) <= 160) {                    $balance = 1;                 } else { //greater than 160                    $count = ((strlen ($message)) / 153);                 if ($count <= 3 && $count >2) {					$balance = 3;					}				if ($count <= 2 && $count >1) {					$balance = 2;								}				if ($count <= 4 && $count >3) {					$balance = 4;					}			}			$recipients = explode(",", $to);$cost = count($recipients) * $balance;    	if ($cost > $left) {    		$error[] = 'insufficient units to send sms.';			}						if (!$error){mysql_query("UPDATE users SET sms = sms-'$cost' WHERE username = '$username'");$tudei = date('Y-m-d');mysql_query("INSERT INTO sms (username, message, date, tono, fromno) VALUES('".$username."','".$message."','".$tudei."','".$to."','".$from."')") or die(mysql_error());$mysms = new sms();$results = $mysms->send($to,$from,$message);}echo $sus;?>

This section of code generates the error you are talking about:

if ($left == '0'){$error[] = 'Not enough SMS credits to deliver this message.';}

As you can see, that error is triggered when the variable $left is set to 0. Working back up the code we find these lines:

$check = mysql_query("SELECT name, firstname, active, sms FROM users WHERE username = '$username'");$row = mysql_fetch_row($check); $_SESSION['name'] = $row[0];$_SESSION['firstname'] = $row[1]; $_SESSION['active'] = $row[2];$_SESSION['sms'] = $row[3];$_SESSION['username'] = $username;$left = $_SESSION['sms'];$on = $_SESSION['active'];

So $left is set from the 'sms' column in the database. Presumably on the row you are using the value for 'sms' is zero. Have a look in the database and check what the value is.

thanks, but the value of the sms colume is set to 1 on the database.
i think this aspect of the scripts generates the error

"$recipients = explode(",", $to);$cost = count($recipients) * $balance;    	if ($cost > $left) {    		$error[] = 'insufficient units to send sms.';			}"

Before the if statement triggering that error, echo out the values of $to, $recipients, $cost, $balance and $left. That should help you narrow down where the problem is occurring.

There doesn't seem to be a problem with the assignment operations for $recipients and $cost. Look up the values for $to, $balance, and $left. Try XDebug - it's a pretty good free debugger that works with Eclipse (or NuSphere, NetBeans or any other PHP IDE).

thanks, but the value of the sms colume is set to 1 on the database. i think this aspect of the scripts generates the error

"$recipients = explode(",", $to);
$cost = count($recipients) * $balance;
if ($cost > $left) {
$error[] = 'insufficient units to send sms.';
}"

thanks the error has been resolved and the script is working perfectly well.

hello i have tried downloading XDEBUGGER please i need help on how to install it. i use windows xp. all that is contained in the software is some zipped file. do i need to install the binaries on my system or on the server?.

There doesn't seem to be a problem with the assignment operations for $recipients and $cost. Look up the values for $to, $balance, and $left. Try XDebug - it's a pretty good free debugger that works with Eclipse (or NuSphere, NetBeans or any other PHP IDE).