Loop not working properly

[thara]

hello..

 

In this script. if part is working properly. but elseif part not working i expect. it display only 1 category and its subjects.

 

Anybody can tell me what the mistake that I have did...

 

Here is my script

 

	} elseif ( isset($_POST['category']) && ( sizeof( $_POST['category']) == 2 || sizeof( $_POST['category']) == 3 )) {

	$q = 'SELECT * FROM category ORDER BY category_id';
	$r = mysqli_query( $dbc, $q);

	while($row = mysqli_fetch_array( $r, MYSQLI_ASSOC  )) {

		foreach( $category as $value ) {

			if ( $value == $row['category_id']) {

				echo '<input type="radio" name="category[]" value="' . $row['category_id'] . '" class="radio" />';
				echo '<label for="" class="radio">  ' . $row['category_name'] . ' <strong>: Mark this category as my "Main Category"</strong></label><br />';

					$q = "SELECT category_subject.category_id, category_subject.subject_id, subjects
							FROM category_subject
							INNER JOIN category ON category_subject.category_id = category.category_id
							INNER JOIN subject ON category_subject.subject_id = subject.subject_id
							WHERE category_subject.category_id = {$row['category_id']}";

					$r = mysqli_query( $dbc, $q);

					$c = $i = 0;

					echo '<table class="form_table" ><tr>'; 

					while($info = mysqli_fetch_array( $r, MYSQLI_ASSOC  )){

						// if remainder is zero after 2 iterations (for 2 columns) and when $c > 0, end row and start a new row:  
						if( ($c % 2) == 0 && $c != 0){
							echo "</tr><tr>";
						}

						echo '<td width="50%"><input type="checkbox" name="category[]"  value="' . $info['subject_id'] . '" />  ' . $info['subjects'] . '</td>';

						$c++; 

					} // while..
						// in case you need to fill a last empty cell:
						if ( ( $i % 2 ) != 0 ){

						// str_repeat() will be handy when you want more than 2 columns
						  echo str_repeat( "<td> </td>", ( 2 - ( $i % 2 ) ) );
						}
					echo "</tr></table>";					
			}
		}			
	}		
} 

[ManiacDan]

You're redefining $r inside your loop.  This is why you need to use descriptive variable names.

[thara]

Its ok now. thanks for your assistance guys!!!

 

Here I use two php page with two forms. my first form is 'sign_up.php' and second is select_subject.php'. sign_up.php page has more categories and users can select up to 3 more categories there. So. after selecting and user click the continue bottom, page want to go to second form page its select_subject.php page.

 

If a user not select a category of who selected over 3 category I need to display a error message. like this  "Please select atleast 1, not more than 3 categories."

 

I use this HTML my first page 

 

<form method="post" action="select_subject.php"> <my select boxes> </form> 

 

Then I process it in my second page and if user have made a mistake in first page I need to redirect to the first page again with relevant error message. So I use this code in my second page.

 

	} else { // No valid ID, kill the script.

	$_SESSION['errors'] = "Please select atleast 1, not more than 3 categories.";

	$url = 'http://localhost/lanka_institute/tutorsignup/tutor_registration.php'; // Define the URL:		
	ob_end_clean(); // Delete the buffer.
	header("Location: $url");
	exit(); // Quit the script.	

}

 

and my first page I use this

 

	if (isset($_SESSION['errors'])) {

	echo '<p> ' . $_SESSION['errors'] . '</p>';

}

unset($_SESSION['errors']);

 

 

but it is not printing my error message in the first page that Im expecting. But it printing 'Array' instead of my message.

 

can you help me, what is the mistake that I have done???

 

thanks in advance.

 

 

 

[ManiacDan]

Are you calling session_start() at the top of every page?

[thara]

yes dear...

 

I have started it in my header.html. it is a include file.

[ManiacDan]

...are HTML files being parsed as PHP on your system?

[thara]

ya.. this is my header.html file..

 

<?php # header.html

// This page begins the HTML header for the site.

// Start output buffering:

ob_start();

// Initialize a session:

session_start();
?><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" 
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head> 
    
<title><?php echo $page_title;?></title>

<link type="text/css"   rel="stylesheet"   href="../styles/main.css" /> 


</head> 
  
<body> 
  
<div id="header_warp">

[ManiacDan]

Put session_start before ob_start

[thara]

problem is still same...

 

It display 'Array' instead of my error message..

[ManiacDan]

Oh geeze, I thought the errors weren't showing at all.  your errors are an array.  echo implode("<br />", $_SESSION['errors']);