Queries with conditional queries - php

Question

Let's say i have a query with quite a number of joins and subqueries in one php file that handles queries.
Nb: i put an example of what $query looks like at the bottom
$query = query here;
if ($query) {
return $query->result();
} else {
return false;
}
}
Then in my php file that handles the html, i have the usual foreach loop with some conditions that require making other queries e.g;
Note: result houses object $query->result().
foreach ($results as $item) {
$some_array = array();
$some_id = $item->id;
if ($some_id != 0) {
//id_return_other_id is a function that querys a db table and returns the specified column in the same table, it returns just one field
$other_id = id_return_other_id($some_id);
$some_query = another query that requires some joins and a subquery;
$some_array = the values that are returned from some_query in an array
//here i'm converting obj post into an array so i can merge the data in $some_array to item(Which was converted into an array) then convert all of it back into an object
$item = (object)array_merge($some_array, (array)$item);
}
//do the usual dynamic html stuff here.
}
This works perfectly but as i don't like the way i'm doing lot's of queries in a loop, is there a way to add the if $some_id != 0 in the file that handles queries?
I've tried
$query = query here;
//declaring some array as empty when some_id is 0
$some_array = array();
if ($query) {
if ($some_id != 0) {
//same as i said before
$other_id = $this->id_return_other_id($some_id);
$some_query = some query;
$some_array = array values gotten from some query;
}
$qresult = (object)array_merge($some_array, (array)$query->result);
return $qresult;
} else {
return false;
}
}
This doesn't work for obvious reasons, does any one have any ideas?
Also if there's a way to make these conditions and queries in the $query itself i'd love you forever.
Ps: A demo query would be something like
$sql = "SELECT p.*,up.*,upi.someField,etc..
FROM (
SELECT (another subquery)
FROM table1
WHERE table1_id = 3
UNION ALL
SELECT $user_id
) uf
JOIN table2 p
ON p.id = uf.user_id
LEFT JOIN table3 up
ON .....
LEFT JOIN table4
ON ....
LEFT JOIN table5
ON ....
And so on..etc..
ORDER BY p.date DESC";
$query = mysql_query..

Answer 1

It seems like you just need to run two queries in your query file. The first query would get a broad set of what you’re looking for. The second query would query an id that’s in the result and perform a new query to get any details about that particular id. I use something similar to this in the customer search page for my application.
$output = array();
$query1 = $this->db->query("SELECT * FROM...WHERE id = ...");
foreach ($query->result_array() as $row1)
{
$output[$row1['some_id']] = $row1;
$query2 = $this->db->query("SELECT * FROM table WHERE id = {$row1['some_id']}");
foreach ($query2->result_array() as $row2)
{
$output[$row1['some_id']]['data_details'][$row2['id']] = $row2;
}
}
Then in your page that displays html, you’ll just need two foreaches:
foreach($queryresult as $key=> $field)
{
echo $field['some_field'];
foreach($child['data_details'] as $subkey => $subfield)
{
echo $subfield['some_subfield'];
}
}
I know you’re using objects, but you could probably convert this to use that format. I hope this makes sense/helps.

Answer 2

use this
if ($some_id !== 0) {
instead of
if ($some_id != 0) {