Hi, I'm new in php, I get this error, can you please fix this.

I need $_GET['post_id'] for get the data from my db with 'unique id', So that It's need 'post_id'. I'm check the $_GET['post_id'] but it's show "'Required variable is not set".

How do i set the variable or how do fix this problem, Don't worry because of i'm new PHP WORLD

<?php

error_reporting(E_ALL);
ini_set('display_errors',1);

include "db/db.php";
$upload_path = "secure/content/blogpostimg";

if (isset($_GET['post_id']))
{
$p_id = (int) $_GET['post_id'];
}
else
{
die('Required variable is not set');
}

$sql = "SELECT * FROM blog_post WHERE post_id = '$p_id'";
$res = mysql_query($sql) or trigger_error(mysql_error()." ".$sql);
if (!mysql_num_rows($res))
{
die("No records found");
}


while ($rel = mysql_fetch_assoc($sql))
{
$id = $rel['post_id'];
$sub = $rel['subject'];
$imgname = $rel['img_name'];
$img = $rel ['image'];
$msg = $rel['message'];
$date = $rel['date'];
$poster = $rel['poster'];
$cat_name = $rel['cat_name'];
?>

<span id="post">

<?php
echo "<h1>". "$sub" ."</h1>". "<br/>";
?>

<?php
echo '<img src="' . $upload_path . '/' . $imgname . '" width="200" /> ';
?>
<?php
include_once("func.php");
echo truncate($rel['message'],"index.php","post_id",$rel['post_id']);

?>

Many Thanks,
Shibbir.

PHP Code:

if (isset($_GET['post_id']))
{
     $p_id = (int) $_GET['post_id'];
}
 else
{
     die('Required variable is not set');
} 


If isset($_GET['post_id']) is returning false, then the URL parameter 'post_id' must not be set.

How do i set the variable or how do fix this problem

Make sure it is on the href of the link that is being clicked on.

I don't understand , can u pls clear it more

Originally Posted by Creativeartbd

I don't understand , can u pls clear it more

The url you used to execute that script does not specify the 'post_id' parameter. For example, the following url does specify a post_id:

http://example.com/myscript.php?post_id=1

So, how do i specify the 'post_id' parameter or is there anything need to change in my code? pls tell me

http://www.webmasterworld.com/forum88/12838.htm

http://www.rotsystems.com/tag/php-querystring-tutorial