PHP, security and features

[Pyro]

While making some basic PHP-code for a site, I've created this small script:

 

 

 

 

 

 

 

//This script has been modified, variables have been changed/removed for security reason.



<?



mysql_connect($host,$username,$password);



@mysql_select_db($database) or die( "Unable to select database");







$query="SELECT * FROM info";



$result=mysql_query($query);







mysql_close();







$article = $_GET["article"];







$content=mysql_result($result,$article,"content");



echo "$content";







?>

 

 

 

 

 

 

 

What it does is use the URL (like if you enter hi.php?article=5 it will find article number 5) to get the right document from the database. However, I'm a bit concerned about security. My knowledge of PHP is a bit lacking, basically I can create a script like this and mod phpbb, but that's about it. Are there any obvious security flaws in this way of using a database?

 

 

 

 

 

 

 

Beyond that, I'd like to tweak it a bit.

 

 

 

 

 

 

 

At the moment, the table it uses looks like this:

 

 

 

 

 

 

 

ID | CONTENT

 

 

 

0 | Blabla

 

 

 

1 | Blabla

 

 

 

2 | Blabla

 

 

 

 

 

 

 

Et cetera. When I use the above script to get an article, the script does not get the article that has the relevant ID number, it gets the article with that position in the table. Now, they are both the same so it doesn't matter, but it's a bit inconvenient for those times when I need to make changes to it. Is there a simple way to make it go by the ID column instead of location in the table?

 

 

 

 

 

 

 

Cheers.

[Ks_Jeppe]

If you make it $article = int($_GET["article"]); instead, it'll make convert the $_GET value into a number... Any text would get the number 0, so if a hacker would try to use a inject here, it wouldn't work... It's the same method used on tip.it, and we havent been (that way) hacked yet ;)

[Ks_Jeppe]

And about the selection thing...

 

 

 

 

 

 

 

//This script has been modified, variables have been changed/removed for security reason.

 

 

 

<?

 

 

 

$article = intval($_GET["article"]);

 

 

 

 

 

 

 

mysql_connect($host,$username,$password);

 

 

 

@mysql_select_db($database) or die( "Unable to select database");

 

 

 

 

 

 

 

$query = "SELECT * FROM info WHERE id = ".$article;

 

 

 

$result = mysql_query($query);

 

 

 

 

 

 

 

while ($myrow = mysql_fetch_array($result)) {

 

 

 

print $myrow['content'];

 

 

 

}

 

 

 

 

 

 

 

mysql_close();

 

 

 

 

 

 

 

?>

Also, make ID a primery key field..

[Pyro]

Thanks for the help, both scripts work great! :)