Get all child, grandchild etc nodes under parent using php with mysql query results

Question

I\'ve been trying to figure this out but I haven\'t gotten anywhere.Hopefully someone can come to my rescue.

My problem is I\'m using adjacency list data model to pr

Answer 1

Here is a way to get you further, and you can decide how you build your result array and what fields you choose to include. This is not tested, but you should see the logic.

// connect to db

// set id counter
$ids = 0;

// declare array
$categories = new Array();

// determine max ids
$query = mysql_query("SELECT COUNT(1) AS ids FROM test");
$result = mysql_fetch_array(query); // get result
$count = $result['ids'];

// loop through ids for parents
for($ids = 0; $ids <= $count; $ids++) {
  $query1 = mysql_query("SELECT * FROM test WHERE id = '" . $ids . "'");
  $query2 = mysql_query("SELECT id, name, parent_id FROM test WHERE parent_id = '" . $ids . "'");
  // check if has children
  if(mysql_num_rows($query2) > 0) {
    // iterate through children and add to array
    while (mysql_fetch_array($query2) as $row) {
      $categories[$ids]['child'][$row['id']] = $row['name'];
    }
  }
  // check if has siblings
  if(mysql_num_rows($query1) > 0) {
    // iterate through children and add to array
    while (mysql_fetch_array($query2) as $row) {
      $categories[$ids]['sibling'][$row['id']] = $row['name'];
    }
  }
}