[SOLVED] Need help to create a checking function!

[Driiper]

Hello everyone! im creating a function for my game that will make players able to buy Territories but im stuck again   what i cant remember how i can make a territory buyable only if you have enough money. at this moment you can buy whatever you want the your money will go down to -100000. how can i make a function that says  "IF $geld - 100000 < 0  get error message"

 

do anyone know how to do that?

 

<?

    

$dbres				= mysql_query("SELECT * FROM `[land]` WHERE `id`='{$_GET['id']}'");
    if($profile = mysql_fetch_object($dbres)) {
      $id				    = $profile->id;
      $owning				= ($profile->owner == "none") ? "This land is not captured yet!<br>
Buy it for $100.000 <form method=\"post\"><input type=submit name=buy value=Buy!></form>" : "Owner: <b><a href=viewprofile.php?viewprofile={$profile->owner}>{$profile->owner}</a></b>.";

if($profile->owner =="{$cookieusername}"){

echo "<a href='est.php?type=1'>Start an crew on this land!</a><BR>";
}
  if(isset($_POST['buy'])) {
    $data->url				= preg_replace('/\</','&#60;',$_POST['website']);
    $data->muziek				= preg_replace('/\</','&#60;',$_POST['muziek']);
    $data->info				= preg_replace('/\</','&#60;',substr($_POST['info'],0,500));
    mysql_query("UPDATE `[land]` SET `owner`='{$cookieusername}' WHERE `id`='{$id}'");
    mysql_query("UPDATE `users` SET `geld`=`geld`-'100000' WHERE `username`='$cookieusername'");
    print "  <tr><td class=\"mainTxt\">This land is yours!</td></tr>\n";
  }


      print <<<ENDHTML
<br>
<br>
<center>
<table border=1 cellspacing=0 cellpadding=2 width=30% bordercolor=black class=sub2>
<tr>
<td align=center background=topic.gif>Owner of this land</td>

</tr><tr><tr><td class="mainTxt" align="center">{$owning}</td></tr>
		</table>
		</center>
		</form>

		<br><br><br><br>

<br /><br />
ENDHTML;


    }


?>

[$username]

To get started it looks like you need to read up on your PHP if statements.

 

Here is a great place to start

 

http://us.php.net/manual/en/control-structures.if.php

 

this should get you in the right direction

<?php
if ($a > $b) {
    echo "a is bigger than b";
    $b = $a;
}
?>

 

[Driiper]

any way you can help me?

[Driiper]

anyone?

[trq]

What is the problem?

[Driiper]

This function lets players buy Territorys in the game, but i need to make something that prevent peoples from buying if they dont have enough money, when they try to buy they should get a message saying, "You dont have enough money"

 

i tryed but it didnt work

 

 

[Driiper]

IF ($geld - 100000 <0) {
$message "You dont have enough money";

} else { (This is where my code should go }

 

This didnt work. what am i doing wrong? sorry but im a newb