Question

I have a database table like below:

id | igroup | title     | url          | text
1  |   gr1  | Title 1   | urltoimage1  | text1
2  |   gr1  | Title 2   | urltoimage2  | text2
3  |   gr2  | Title 3   | urltoimage3  | text3
4  |   gr2  | Title 4   | urltoimage4  | text4

I mean, i want to have an multidimensional array (for above structure) like below;

$result[gr1] = [Title 1|urltoimage1][Title 2|urltoimage2]
$result[gr2] = [Title 3|urltoimage3][Title 4|urltoimage4]

Finally, I’ll send this $result array to page via JSON.

So, in my page I’ll arrange these values for classified image gallery, like:

Group 1(caption text)
--------
image1 image2 (clickable images)

Group 2(caption text)
--------
image3 image4 (clickable images)

Edit: i corrected group field by igroup.

Question revised.

Answer 1

You will need to fetch the results using the ORDER BY statement added to your query.

SELECT id, igroup, title, url, text
FROM images
ORDER BY igroup;

Warning:

Please, don’t use mysql_* functions to write new code. They are no longer maintained and the community has begun the deprecation process. See the red box?

Instead, you should learn about prepared statements and use either PDO or MySQLi. This article should give some details about deciding which API to use. For PDO, here is a good tutorial.

Example code:

$result = mysql_query(THE_STATEMENT_ABOVE);

$groups = array();
while ( $row = mysql_fetch_assoc($result) )
    $groups[ $row['igroup'] ][] = $row;

This will build up a nice $groups array. To parse the array created above, you might either use Iterators or simple foreach constructs.

foreach ( $groups as &$one_group ) {
    print("Group 1: <br>");

    foreach ( $one_group as &$one_image ) {
        // Here you have the contets of the previously fetched $row rows of the result.
        print('<a href="' .$one_image['url']. '">' .$one_image['title']. '</a><br>');
    }
}

This will give you a nice output like this below:

Group 1:
Image 1 (clickable)
Image 2 (clickable)

Group 2:
Image 3 (clickable)
Image 4 (clickable)

No longer applies: Also, you should refrain from using GROUP as a field name, as it is one of the reserved MySQL words.

Edit: I have also corrected the field name to igroup.