arrange category and subcategory in php and Codeigniter - php

Question

Here I have my database table and my table name is category where I store my data category and subcategory in category column
i want to fetch this data like this format in ul li for this code i have trying to arrange but i am not fetch data perfectly like this please help me to arrange my code this format.

Answer 1

You can try like this
//to select categories
$this ->db-> select();
$this->db->from('category');
$this->db->where('pid',0);
$query = $this->db->get();
$categories = array();
$i=0;
foreach ($query->result_array() as $row) {
//put all category names to $categories array
$categories[$i] =$row['category'];
$i++;
}
//to select relevant sub categories
$sub_categories=array();
foreach ($categories as $category) {
$this ->db-> select();
$this->db->from('category');
$this->db->like('category', $category, 'after');
$query = $this->db->get();
$j=0;
foreach ($query->result_array() as $row) {
//put all sub categories names to $sub_categories array
$sub_categories[$category][$j] =$row['category'];
$j++;
}
}
$return_data['categories']=$categories;
$return_data['sub_categories']=$sub_categories;
return $return_data;

Answer 2

This code is useful for get nth level of category,subcategory array
controller:
$this->load->model('getmenu_model');
function get_menu() {
$ci = & get_instance();
$ci->load->model("getmenu_model");
$menu['menu'] = $ci->getmenu_model->get_menu();
$echo = echoMenu($menu['menu']);
//$echo.= "<li>Loose Diamonds</li>";
$menu['print_menu']=$echo;
print_r($menu);
//return $menu;
}
function echoMenu($arr) {
$ci = & get_instance();
$echo = "";
//$echo.="<ul>";
foreach ($arr as $subArr) {
if (!empty($subArr['sub_menu'])) {
$echo.= "<li>";
$echo.= "" . $subArr['name'] . "";
if ($subArr['sub_menu']) {
$echo.= "<ul>";
$echo .=echoMenu($subArr['sub_menu']);
$echo.= "</ul>";
}
$echo.= "</li>";
} else {
$echo.= "<li>" . $subArr['name'] . "</li>";
}
}
//$echo.= "</ul>";
return $echo;
}
model:
public function get_menu() {
$this->db->select('id,name,parent_id');
$menu = $this->db->get('category')->result_array();
$data=$this->menu_child($menu);
//print_r($data);
return $data;
}
function menu_child($menu, $parent = NULL) {
// echo $parent."---";
$main_menu = array_filter($menu, function($a)use($parent) {
return $a['parent_id'] == $parent;
});
// print_r($main_menu);
if ($main_menu) {
foreach ($main_menu as $key => $value) {
$main_menu[$key]['sub_menu'] = $this->menu_child($menu, $value['id']);
}
}
// print_r($main_menu);
return $main_menu;
}