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+--- Thread: Hello, I'm trying to make a nested structure (/showthread.php?tid=27925)
Hello, I'm trying to make a nested structure - El Forum - 02-24-2010
[eluser]Unknown[/eluser]
So, based on skunkbad's code, I tried to make a controller to manage a nested structure.
I'm new to Codeigniter, so it may be a easy sollution, still unrevealled for me
Code:
class Menu extends Controller{
function __construct(){
parent::Controller();
}
function index(){
echo 'No errors!';
$i = array();
$i[] = array('Examples', 1, 0);
$i[] = array('Widgets', 2, 1);
$i[] = array('Things', 3, 0);
$i[] = array('Shiny', 4, 3);
$i[] = array('Metal', 5, 4);
$i[] = array('Silver', 6, 5);
foreach ($i as $a){
//if top level
if($a[2] == 0){
//create a top level category
$menu[$a[0]] = array('category_id' => $a[1]);
}
else{
foreach($menu as $b => $c){
if($c['category_id'] == $a[2]){
$menu[$b]['sub'][$a[0]] = array('category_id' => $a[1]);
break;
}
elseif (array_key_exists('sub', $c)){
foreach($c['sub'] as $d => $e){
if($e['category_id'] == $a[2]){
$menu[$b]['sub'][$d]['sub'][$a[0]] = array('category_id' => $a[1]);
break;
}
elseif(array_key_exists('sub', $e)){
foreach($e['sub'] as $f => $g){
if($g['category_id'] == $a[2]){
$menu[$b]['sub'][$d]['sub'][$f]['sub'][$a[0]] = array('category_id' => $a[1]);
break;
}
}
}
}
}
}
}
}
$this->buildMenu($menu, FALSE);
}
function buildMenu($menu_array, $is_sub = FALSE){
/**
* If the supplied array is part of a submenu, add the sub-menu class instead
* of the menu ID for CSS styling
*/
$attr = (!$is_sub) ? ' id="menu"' : 'class="submenu"';
$menu = "<ul$attr>\n"; // open the menu container
/**
* Loop through the array to extract element values
*/
foreach($menu_array as $id => $properties){
/**
* Because each page element is another array, we need to loop again
* This time we save individual array elements as variables, using the array
* key as the variable name.
*/
foreach($properties as $key => $val){
/**
* If the array element contains another array, call the buildMenu()
* function recursively to build the submenu and store it in $sub
*/
if(is_array($val)){
$sub = buildMenu($val, TRUE);
}
/**
* Otherwise, set $sub to NULL and store the element's value in a variable
*/
else{
$sub = NULL;
$$key = $val;
}
}
/**
* If no array element had the key 'url', set the $url variable equal to the containing
* element's ID
*/
if(!isset($url)){
$url = $id;
}
/**
* Use the created variables to output HTML
*/
$menu .= '<li><a href = "$url">$url</a>$sub</li>\n';
/**
* Destroy the variables to ensure they're reset on each iteration
*/
unset($url, $display, $sub);
}
return $menu . "</ul>\n";
}
}When I use this, I get 2 php errors:
Quote:A PHP Error was encountered
Severity: Warning
Message: Missing argument 1 for buildmenu()
Filename: controllers/menu.php
Line Number: 68
A PHP Error was encountered
Severity: Warning
Message: Invalid argument supplied for foreach()
Filename: controllers/menu.php
Line Number: 82
Can anyone know what is happening, because I use the function buildMenu() from inside controller's index() function, and $menu is a valid parameter which I think I passed it correctly.
Hello, I'm trying to make a nested structure - El Forum - 02-24-2010
[eluser]danmontgomery[/eluser]
Code:
if($a[2] == 0){
//create a top level category
$menu[$a[0]] = array('category_id' => $a[1]);
}
else{
foreach($menu as $b => $c){in your foreach() here menu has never been declared, so buildMenu is being passed a variable that doesn't exist.
Hello, I'm trying to make a nested structure - El Forum - 02-24-2010
[eluser]Unknown[/eluser]
I defined $menu = array(); just above $i. Still same errors.
Hello, I'm trying to make a nested structure - El Forum - 02-24-2010
[eluser]danmontgomery[/eluser]
Code:
$sub = buildMenu($val, TRUE);should be
Code:
$sub = $this->buildMenu($val, TRUE);