Hello im trying to fectch all childs and sub childs of a record in db
so far i've got this
function fetchNetChildren($parent, $network) {
$db = JFactory::getDBO();
$db->setQuery('SELECT id FROM #__sometable_clients WHERE network_referal = '.$parent.' AND networks = '.$network.' AND `status` > 0');
$list = array();
while (true){
$row = $db->loadAssocList();
$list[] = $row['id'];
$list = array_merge($list, fetchNetChildren($row['id'], $network));
}
return $list;
}
when i run this ive got a 500 eror and have no idea why, any tips?
Ive achieved this using a different aproach, ive discarded the initial funcion and created 2 others that returns what i want.
1 - I've created a mysql query that returns in a multidimensional array of all childrens, grandchildrens etc of the provided id.
function getChilds($parentid, $network) {
// query linda e maravilhosa
$query = '
select #pv:=id as id, network_referal from #__mytable
join
(select #pv:='.$parentid.')tmp
where network_referal=#pv and networks = '.$network.' ';
$campos = carregarcampos($query,'list');
return $campos;
}
2 - WIth the data $elements now i can manipulate and create a php multidimentional array organizing the provided data
function buildTree(array $elements, $parentId = 0) {
$branch = array();
foreach ($elements as $element) {
if ($element['parent_id'] == $parentId) {
$children = buildTree($elements, $element['id']);
if ($children) {
$element['children'] = $children;
}
$branch[] = $element;
}
}
return $branch;
}
so to use i must run
buildTree(getChilds($parentid, $network), $parentid)
Related
Apologize for the repeated question. Return multiple values from database with function. I tried executing code, the function returns one value, where I want all the values of id and name.
Database: id and name has 9 rows. Is there anything I was missing in my code.
function readdata() {
$sth = $db->execute('SELECT * FROM mynumbers m WHERE m.id>1 ORDER BY m.id ASC');
foreach ($sth as $s) {
$object = new stdClass();
$object->id = $s->id;
$object->name = $s->name;
return $object;
}
}
$rd = readdata();
echo $rd->id;
echo $rd->name;
May be something like this:
function readdata() {
$sth = $db->execute('SELECT * FROM mynumbers m WHERE m.id>1 ORDER BY m.id ASC');
$out = [];
foreach ($sth as $s) {
$object = new stdClass();
$object->id = $s->id;
$object->name = $s->name;
$out[] = $object;
}
return $out;
}
$rd = readdata();
//and here
foreach($rd as $obj){
echo $obj->id;
echo $obj->name;
}
This is more a suggestion than an answer. Why re-inventing the wheel? PDO already is capable of returning classes and also fetching all results into an array.
function readdata(PDO $db): array
{
$sth = $db->prepare('SELECT * FROM mynumbers m WHERE m.id>1 ORDER BY m.id ASC');
$sth->execute();
return $sth->fetchAll(PDO::FETCH_CLASS);
}
$objects = readdata($db);
$objects is now an array. Each element contains a stdClass object with each column name as property.
foreach($objects as $object) {
echo $object->id, PHP_EOL;
echo $object->name, PHP_EOL;
}
Your foreach loop intends to run through all values of the array $sth, but returns only with the FIRST one.
You can just return $sth to get the whole array, or build a new array and append to it:
$ret = array();
foreach ($sth as $s) {
...
$ret[] = $object;
}
and then
return $ret;
I have an array of data that is being created from a MySQL query which I am then using to create more data which I then need back in the array (or a new one) but I haven't been able to get this working at all.
Here is the code I have been trying to use:
$vars['items'] = $this->_query('SELECT customers.*, sites.site_name as `default_location`
FROM `customers`
JOIN `sites` ON customers.site_id=sites.id');
$a=array();
foreach($vars['items'] as $customer)
{
if($customer['record_to_use'] == '2')
{
$results = dns_get_record($customer['cust_mx'], DNS_MX);
$mx = min(array_column($results, "pri"));
$highest = array_filter(
$results,
function($item) use($mx) {return $item["pri"] === $mx;}
);
foreach ($highest as $mx)
{
$results = dns_get_record($mx["target"], DNS_A);
foreach ($results as $a)
{
$vars['items']['ip'] .= $a['ip'];
}
}
}
}
So I need the IP that gets created from each item in the array to get added into that array as $vars['items']['ip']
Thanks in advance!
foreach ($results as $a => $value)
{
$vars['items'][$a]['ip'] = $value['ip'];
}
That's what I needed :)
$vars['items']['ip'] .= $a['ip'];
.= is concatenation if that was a typo in your code.
Try $vars['items']['ip'] = $a['ip'];
I'm working on a project in which I pull various statistics about the NHL and inserting them into an SQL table. Presently, I'm working on the scraping phase, and have found an XML parser that I've implemented, but I cannot for the life of me figure out how to pull information from it. The table can be found here -> http://www.tsn.ca/datafiles/XML/NHL/standings.xml.
The parser supposedly generates a multi-dimmensional array, and I'm simply trying to pull all the stats from the "info-teams" section, but I have no idea how to pull that information from the array. How would I go about pulling the number of wins Montreal has? (Solely as an example for the rest of the stats)
This is what the page currently looks like -> http://mattegener.me/school/standings.php
here's the code:
<?php
$strYourXML = "http://www.tsn.ca/datafiles/XML/NHL/standings.xml";
$fh = fopen($strYourXML, 'r');
$dummy = fgets($fh);
$contents = '';
while ($line = fgets($fh)) $contents.=$line;
fclose($fh);
$objXML = new xml2Array();
$arrOutput = $objXML->parse($contents);
print_r($arrOutput[0]); //This print outs the array.
class xml2Array {
var $arrOutput = array();
var $resParser;
var $strXmlData;
function parse($strInputXML) {
$this->resParser = xml_parser_create ();
xml_set_object($this->resParser,$this);
xml_set_element_handler($this->resParser, "tagOpen", "tagClosed");
xml_set_character_data_handler($this->resParser, "tagData");
$this->strXmlData = xml_parse($this->resParser,$strInputXML );
if(!$this->strXmlData) {
die(sprintf("XML error: %s at line %d",
xml_error_string(xml_get_error_code($this->resParser)),
xml_get_current_line_number($this->resParser)));
}
xml_parser_free($this->resParser);
return $this->arrOutput;
}
function tagOpen($parser, $name, $attrs) {
$tag=array("name"=>$name,"attrs"=>$attrs);
array_push($this->arrOutput,$tag);
}
function tagData($parser, $tagData) {
if(trim($tagData)) {
if(isset($this->arrOutput[count($this->arrOutput)-1]['tagData'])) {
$this->arrOutput[count($this->arrOutput)-1]['tagData'] .= $tagData;
}
else {
$this->arrOutput[count($this->arrOutput)-1]['tagData'] = $tagData;
}
}
}
function tagClosed($parser, $name) {
$this->arrOutput[count($this->arrOutput)-2]['children'][] = $this->arrOutput[count($this- >arrOutput)-1];
array_pop($this->arrOutput);
}
}
?>
add this search function to your class and play with this code
$objXML = new xml2Array();
$arrOutput = $objXML->parse($contents);
// first param is always 0
// second is 'children' unless you need info like last updated date
// third is which statistics category you want for example
// 6 => the array you want that has wins and losses
print_r($arrOutput[0]['children'][6]);
//using the search function if key NAME is Montreal in the whole array
//result will be montreals array
$search_result = $objXML->search($arrOutput, 'NAME', 'Montreal');
//first param is always 0
//second is key name
echo $search_result[0]['WINS'];
function search($array, $key, $value)
{
$results = array();
if (is_array($array))
{
if (isset($array[$key]) && $array[$key] == $value)
$results[] = $array;
foreach ($array as $subarray)
$results = array_merge($results, $this->search($subarray, $key, $value));
}
return $results;
}
Beware
this search function is case sensitive it needs modifications like match to
a percentage the key or value changing capital M in montreal to lowercase will be empty
Here is the code I sent you working in action. Pulling the data from the same link you are using also
http://sjsharktank.com/standings.php
I have actually used the same exact XML file for my own school project. I used DOM Document. The foreach loop would get the value of each attribute of team-standing and store the values. The code will clear the contents of the table standings and then re-insert the data. I guess you could do an update statement, but this assumes you never did any data entry into the table.
try {
$db = new PDO('sqlite:../../SharksDB/SharksDB');
$db->setAttribute(PDO::ATTR_ERRMODE,PDO::ERRMODE_EXCEPTION);
} catch (Exception $e) {
echo "Error: Could not connect to database. Please try again later.";
exit;
}
$query = "DELETE FROM standings";
$result = $db->query($query);
$xmlDoc = new DOMDocument();
$xmlDoc->load('http://www.tsn.ca/datafiles/XML/NHL/standings.xml');
$searchNode = $xmlDoc->getElementsByTagName( "team-standing" );
foreach ($searchNode as $searchNode) {
$teamID = $searchNode->getAttribute('id');
$name = $searchNode->getAttribute('name');
$wins = $searchNode->getAttribute('wins');
$losses = $searchNode->getAttribute('losses');
$ot = $searchNode->getAttribute('overtime');
$points = $searchNode->getAttribute('points');
$goalsFor = $searchNode->getAttribute('goalsFor');
$goalsAgainst = $searchNode->getAttribute('goalsAgainst');
$confID = $searchNode->getAttribute('conf-id');
$divID = $searchNode->getAttribute('division-id');
$query = "INSERT INTO standings ('teamid','confid','divid','name','wins','losses','otl','pts','gf','ga')
VALUES ('$teamID','$confID','$divID','$name','$wins','$losses','$ot','$points','$goalsFor','$goalsAgainst')";
$result= $db->query($query);
}
I am having a table like the following,need to display as Parent and child format
--------------------------------------------------------
id role_name role_id parent_id
--------------------------------------------------------
1 NSM 1 0
2 MR 5 2
3 ASM 4 3
4 ZSM 3 4
5 RSM 2 1
---------------------------------------------------------
the result is like to be the following
NSM
---RSM
-----ZSM
-----NSM
-----MR
NSM->ROOT
RSM->FIRST CHILD
ZSM->SECOND CHILD
NSM->THIRD CHILD
MR->LEAF
// Fetch all the roles
$result = mysql_query("select * from roles");
$roles = array();
while( $role = mysql_fetch_assoc($result) ) {
$roles[] = $role;
}
// Function that builds a tree
function build_tree($roles, $parent_id=0) {
$tree = array();
foreach ($roles as $role) {
if ($role['parent_id'] == $parent_id) {
$tree[] = array(
'role' => $role,
'children' => build_tree($roles, $role['parent_id'])
);
}
}
return $tree;
}
// Function that walks and outputs the tree
function print_tree($tree) {
if (count($tree) > 0) {
print("<ul>");
foreach($node in $tree) {
print("<li>");
htmlspecialchars($node['role']['role_name']);
print_tree($node['children']);
print("</li>");
}
print("</ul>");
}
}
SQL Results are always flat - you'll not be able to return a hierarchy view of that data in a query.
Instead, I would suggest using whichever client components you are using to show that (is it a tree? what exactly?) that knows how to go thru a flat list and build a hierarchy out of that.
If you want to print a view like that in a console (why would you ever want to do that?), you could do like this:
$data = array();
$query = mysql_query("SELECT * FROM table ORDER BY parent_id");
while($array = mysql_fetch_assoc($query))
{
$data[$array['parent_id']][] = $array;
}
function output_hierarchy($id, $prepend)
{
$current = $data[$id];
foreach($current as $item)
{
print $prepend . " " . $item['role_name'];
if(count($data[$item['id']]) > 0)
{
output_hierarchy($item['id'], $prepend . "--");
}
}
}
output_hierarchy(0, '');
If you want to use this on your website, you can easily adapt it. Code should be self-explanatory.
I'm creating a tree-structure of categories with parentid's which can be called from children in such a way:
ID | Name | ParentID
1 1 0
2 2 1
3 3 2
4 4 1
Resulting in this:
1 = 1
2 = 1 -> 2
3 = 1 -> 2 -> 3
4 = 1 -> 4
which means 3 is a child of 2, which is a child of 1.
when trying to get this idea (with the -> to show what relations are set) I only get to the second grade (1 -> 2) but not to the third (1->2->3) because of the looping function I use for it.
//put all ID's in an array
while ($row2 = $connector->fetchArray($result2)){
$id = $row2['ID'];
$parents[$id] = $row2['name'];
}
// show the tree-structure
while ($row = $connector->fetchArray($result)){
if($row['parentid']!=0)echo $parents[$row['parentid']].' -> ';
echo $row['name'].' - ';
echo '<br>';
}
I'd like two things to change:
have the code automatically generate a tree sized as necessary.
in the while-loops i have to select the $result twice (once as $result, once as $result2) to make it work. these $result's have exactly the same database-query:SELECT ID,name,parentid FROM categories
to fetch results from. I'd like to only declare this once.
Thanks for all the good answers. I've gone with the easiest, less-code-to-implement approach:
$result = $connector->query('SELECT ID,name,parentid FROM categories');
// Get an array containing the results.
$parents = array();
while ($row = $connector->fetchArray($result)){
$id = $row['ID'];
$parents[$id] = array('ID' => $row['ID'],'name' => $row['name'],'parentid' => $row['parentid']);
}
foreach ($parents as $id => $row){
$pid=$id;
$arrTmp= array();
do { // iterate through all parents until top is reached
$arrTmp[]=$pid;
$pid = $parents[$pid]['parentid'];
}while ($pid != 0);
$arrTmp = array_reverse($arrTmp);
foreach($arrTmp as $id){
echo $parents[$id]['name'].' -> ';
}
echo '<br>';
}
Rather than have PHP organize the items into a tree, why not ask the database to do it for you? I found this article on hierarchical data to be very good and the examples are almost identical to yours.
EDIT
The SQL for getting the full tree using the Adjacency Model is not ideal. As the article explains it requires rather a lot of joins for even a small hierarchy. Is it not possible for you to use the Nested Set approach? The SQL stays the same regardless of the size of the hierarchy and INSERT and DELETE shouldn't be very difficult either.
If you really want to do hierachies with parent ids(suitable only for small number of items/hierachies)
I modified your code a little bit(I did not test it so there may be some syntax errors):
//put all recordsets in an array to save second query
while ($row2 = $connector->fetchArray($result2)){
$id = $row2['ID'];
$parents[$id] = array('name' => $row2['name'],'parent' => $row2['parentid']);
}
// show the tree-structure
foreach ($parents as $id => $row){
$pid = $row['parentid'];
while ($pid != 0){ // iterate through all parents until top is reached
echo $parents[$pid]['name'].' -> ';
$pid = $parents[$pid]['parentid'];
}
echo $parents[$id]['name'].' - ';
echo '<br>';
}
To answer your comment:
$parents = array();
$parents[2] = array('ID'=>2,'name'=>'General','parentid'=>0);
$parents[3] = array('ID'=>3,'name'=>'Gadgets','parentid'=>2);
$parents[4] = array('ID'=>4,'name'=>'iPhone','parentid'=>3);
foreach ($parents as $id => $row){
$pid=$id;
$arrTmp= array();
do { // iterate through all parents until top is reached
$arrTmp[]=$pid;
$pid = $parents[$pid]['parentid'];
}while ($pid != 0);
$arrTmp = array_reverse($arrTmp);
foreach($arrTmp as $id){
echo $parents[$id]['name'].' -> ';
}
echo '<br>';
}
Prints out:
General ->
General -> Gadgets ->
General -> Gadgets -> iPhone ->
Maybe easier with OOP. Just sort the query by parentId
Note: The listChildren method and the printout at the bottom is just there to show it is listed correctly. I did not interpret the question that the display was important.
class Element {
public $id;
public $name;
public $parent = null;
public $children = array();
public function __construct($id, $name)
{
$this->id = $id;
$this->name = $name;
}
public function addChild($element)
{
$this->children[$element->id] = $element;
$element->setParent($this);
}
public function setParent($element)
{
$this->parent = $element;
}
public function hasChildren()
{
return !empty($this->children);
}
public function listChildren()
{
if (empty($this->children)) {
return null;
}
$out = array();
foreach ($this->children as $child) {
$data = $child->id . ':' . $child->name;
$subChildren = $child->listChildren();
if ($subChildren !== null) {
$data .= '[' . $subChildren . ']';
}
$out[] = $data;
}
return implode(',', $out);
}
}
$elements = array();
$noParents = array();
while ($row = $connector->fetchArray($result)) {
$elements[$row['id']] = $element = new Element($row['id'], $row['name']);
if (isset($elements[$row['parent']])) {
$elements[$row['parent']]->addChild($element);
} else {
$noParents[] = $element;
}
}
foreach ($noParents as $element) {
if ($element->hasChildren()) {
echo "Element {$element->id} has children {$element->listChildren()}.\n";
} else {
echo "Element {$element->id} has no children.\n";
}
}
If you are using PostgreSQL as the database, you can use the connectby() function to create the record set:
SELECT *
FROM connectby('tableName', 'id', 'parent_id')
AS t(keyid text, parent_keyid text, level int);
I love this function, and use all the time in my code. It can do some very powerful things, very quickly, and you don't have maintain the left/right values like the (adjacency model).