Need an if doesnt exist in database statement :(

[viion]

Been trying forever to figure this out, driving me nuts!

 

I need this page to search my database and see if the session username exists, if it doesnt it comes back with a form (review form) and also shows a coupon. Now i'm trying to get the coupon bit to work.

 

Basically I am trying to:

IF exists: Your coupon is: blah blah

IF doesn't exist: Review to receive coupon

 

I can't do a like select * where username='w/e' because, comes back with invalid or i dont know how to do it properly,

 

at the moment i am trying to make it parse out all the usernames in the table, if any of them = the session name, it makes $answer = true, if not then $answer = false, then later on in code, if true, Your coupon is blah blah, if false, review!

 

This is my coding, when I run it, it notices that $answer = "false" but it still shows the coupon code as if it equals true as well.

 

Any help?

<?
$result = @mysql_query("SELECT * FROM salon_data WHERE salon_name='$name' LIMIT 0,1"); 
if (!$result) { 
echo("<strong>Error performing query: " . mysql_error() . "</strong>"); 
exit(); 
}
$sqlx = @mysql_query("SELECT * FROM salon_stats_data WHERE salon_name='$name'"); 
// SQL ERROR CHECK
if (!$sqlx) { 
echo("<b>Error performing query: " . mysql_error() . "</b>"); 
exit(); 
} 

$answer = "";

if($session->logged_in) {
// ----------		
while ($row = mysql_fetch_array($result)) { 
	$salon_coupon = $row["salon_coupon"];
	$salon_name = $row["salon_name"];

	while ($rw2 = mysql_fetch_array($sqlx) ) { 
		$salon_username = $rw2["salon_username"];
		echo "Salon Username: $salon_username<br>";

		if ($salon_username == $session->username) {
		$answer = "true";
		} else {
		$answer = "false";
		}
	}
}
// ----------	
}
echo "<br> ($answer) <br>";
// Check Answer
if ($answer = "true") {
echo "<strong>$session->username</strong>. <br /><img src='img/action_check.png'> Your Coupon for <strong>$salon_name</strong> is: <span id='stat'><strong>$salon_coupon</strong></span><br /><br />";
}
if ($answer = "false") {
echo "Hello $session->username! If you rate and review this salon, you'll be eligible for a coupon!";
}
// If user not logged in:
if(!$session->logged_in){
echo "Hello! <a href='?c=a1'>Register now</a> to rate and review this salon, you'll be eligible for a coupon!<br /><br />"; 
}
?>

 

[Mchl]

if ($answer = "true") {

 

should be

 

if ($answer == "true") {

 

same for 'false' of course

 

What you did wrong:

= is for assigning values.

== is for comparing values

 

When you use = in if(), PHP assigns a value ("false") to variable ($answer) and says "hey I did it!" - which means the if() evaluates as true.