Joining 2 mysql tables and generating an array - php

Question

entries and images and have been trying every way I can find to join them to get the below result
entries:
entry_id
name
images:
entry_id
image_url
I'm using php and would like to be able to retrieve all associated image_url rows for a given entry_id and combine them with the other information from the entries table.
So I have something like:
entries:
1, Brian
2, Steve
3, Jane
images:
1, images/brian1.jpg
1, images/brian2.jpg
2, images/steve.jpg
3, images/jane_1.jpg
3, images/jane_2.jpg
3, images/jane_3.jpg
And would like to get an array back something like
array(3) {
[0]=>
array(3) {
["entry_id"]=>
string(1) "1"
["name"]=>
string(5) "Brian"
["images"]=>
array(2) {
["image_url"]=>
string(17) "images/brian1.jpg"
["image_url"]=>
string(17) "images/brian2.jpg"
}
}
[1]=>
array(3) {
["entry_id"]=>
string(1) "2"
["name"]=>
string(5) "Steve"
["images"]=>
array(1) {
["image_url"]=>
string(16) "images/steve.jpg"
}
}
[2]=>
array(3) {
["entry_id"]=>
string(1) "3"
["name"]=>
string(5) "Jane"
["images"]=>
array(3) {
["image_url"]=>
string(18) "images/jane_1.jpg"
["image_url"]=>
string(18) "images/jane_2.jpg"
["image_url"]=>
string(18) "images/jane_3.jpg"
}
}
}
Thank you!

Answer 1

Having tested none of this, I assume you want something like this:
SELECT * FROM entries INNER JOIN images ON images.entry_id = entries.entry_id
Then loop through those results:
$entries = array();
while ($row = mysql_fetch_assoc($data))
{
if (!isset($entries[$row['entry_id']]))
{
$row['images'] = array();
$entries[$row['entry_id']] = $row;
}
$entries[$row['entry_id']]['images'][] = $row['image_url'];
}
Then you can loop through this return:
foreach ($entries as $entry)
{
foreach ($entry['images'] as $image);
// do something interesting
}
That should about do it for you, but you may have to modify some things.

Answer 2

Do you have your database connection code sorted?
I believe your looking for a full outer join. Check this resource for SQL examples for the different joins.
http://www.codeproject.com/Articles/33052/Visual-Representation-of-SQL-Joins

Answer 3

The easy way is something like this
select * from entries, images where images.entry_id = entries.entry_id group by entries.entry_y;
making the join is something like this:
SELECT * FROM entries INNER JOIN images ON images.entry_id = entries.entry_id

Answer 4

For display array like that, you cannot use join, try this :
select all data in table entries
foreach table entries, when foreach include table images
Ex:
$q_e = "SELECT * FROM entries";
$result_entry = mysql_query($q_e);
$entries = array();
$images = array();
while($entry = mysql_fetch_array($result_entry)) {
$q_i = "SELECT * FROM `images` WHERE `entry_id` = '".$entry['entry_id']."'";
$result_image = mysql_query($q_i);
while($image = mysql_fetch_array($result_image)) {
$images[] = array(
'image_url' => $image['image_url']
);
}
$entries[] = array (
'entry_id' => $entry['entry_id'],
'name' => $entry['name'],
'images' => $images,
);
}
echo 'pre>';var_dump($entries);