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i have a problem with ‘ in the end of link

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Jun 29.2012

When my link: [url]http://xxxxxxxxxx.com/categories.php?id=99[/url] … the link page is with no problems…but when some one write ‘ afther the link..like this: [url]http://xxxxxxxxxx.com/categories.php?id=99[/url]‘ …. i have a mysql problem:
“

[code=php]Warning: mysql_fetch_assoc() expects parameter 1 ….[/code]

“
my check is:

[code=php]if(isset($_GET[‘cat’]))
$arts_id = $_GET[‘cat’];
else…..[/code]

what edits should i do :S ?

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PHP

4 Comments(s) ↴

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@rtretheweyJun 29.2012 — You should always sanitize $_GET and $_POST data with functions like mysql_real_escape_string() to prevent hacking attacks and to avoid problems like the one you're having with random strings. See the php.net page on mysql_real_escape_string().
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@mekhaauthorJun 29.2012 — mm i solved it with

(int) because it is a number...thank u very much man
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@laxmitekJun 30.2012 — nice answer ...............Thank you for your sharing!..........this site is best for developers
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@DasherJun 30.2012 — shouldn't it be

if(isset($_GET['id']))

$arts_id = $_GET['id'];

else.....

since it is ?id=99 in the url.
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