How to Merge PDO Mysql Array Data using Php - php

Question

I need to merge categories and subcategories into one array. Here is code.
$sql = 'select * from category where id = ?';
$q = $db->prepare($sql);
$q->bindParam(1, $id);
$q->execute();
while($rows = $q->fetch()){
$cat[] = $rows['id'];
$s = 'select * from category where category_id = ?';
$q = $db->prepare($s);
$q->bindParam(1, $rows['id']);
$q->execute();
while($row = $q->fetch()){
$list[] = $row['id'];
}
$data = array_push($cat, $list);
echo $data;
}
I am getting 2 value when printing instead ids numbers

Answer 1

are you want to merge $cat and $list?
you can try:
array_merge($cat, $list);

Answer 2

I solved this problem with the help of this post combine-results-from-two-pdo-queries
$id = '1';
$results = array();
$sql = 'select * from category where id = ?';
$q = $db->prepare($sql);
$q->bindParam(1, $id);
$q->execute();
while($rows = $q->fetch(PDO::FETCH_ASSOC)){
$results[] = $rows['id'];
}
$s = 'select * from category where category_id = ?';
$q = $db->prepare($s);
$q->bindParam(1, $id);
$q->execute();
while($row = $q->fetch(PDO::FETCH_ASSOC)){
$results[] = $row['id'];
}
var_dump($results);

Answer 3

I think what you want is this:
$sql = 'select * from category where id = ?';
$q = $db->prepare($sql);
$q->bindParam(1, $id);
$q->execute();
$data = array();
while($rows = $q->fetch()){
$cat[] = $rows['id'];
$s = 'select * from category where category_id = ?';
$q = $db->prepare($s);
$q->bindParam(1, $rows['id']);
$q->execute();
while($row = $q->fetch()){
$list[] = $row['id'];
}
$data = array_merge($data, $cat, $list);
//$data = array_unique($data);
print_r($data);
}
Notice the $data = array(); before the while loop. With array_merge you merge categories and subcategories with the $data array into the data array.
If you happen to get duplicted value you do not need or want, simply uncomment $data = array_unique($data); and it will erase duplicated entries for you.
Please clarify your question, if I do not address your problem and I will update my answer.
Have fun, may the source be with you.