Dynamic multilevel menu in php

Question

i have a table name called menuitems,roles2menu.i fetched group of menu_id,menu_sub_id,menu_child_id in one column, by writing union clause select query.Now i have the values of menu_id,menu_sub_id,menu_child_id.With these values,i want to display multilevel menu in php(in ul and li tag)

i queried and output result is Menuids MenuName 500 Transaction 600 Administrator 700 Reports 501 Stock(MENU_SUB_ID) 502 Sales(MENU_SUB_ID) i have all(menu_id,menu_sub_id,menu_child_id) in above one column ie,Menuids. How to compare these id's in front page php.

Answer 1

Due to not proper information, i will show you the way of creating multiple menus with UL LI structure.

Please have a look the steps.

1) Table structure of my table.

CREATE TABLE IF NOT EXISTS `menu` (
  `menu_id` int(11) NOT NULL AUTO_INCREMENT,
  `menu_name` varchar(255) NOT NULL,
  `parent_id` int(11) NOT NULL DEFAULT '0' COMMENT '0 if menu is root level or menuid if this is child on any menu',
  `link` varchar(255) NOT NULL,
  `status` enum('0','1') NOT NULL DEFAULT '1' COMMENT '0 for disabled menu or 1 for enabled menu',
  PRIMARY KEY (`menu_id`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 AUTO_INCREMENT=37 ;

2) dump some data inside the table.

INSERT INTO `menu` (`menu_id`, `menu_name`, `parent_id`, `link`, `status`) VALUES
(1, 'Home', 0, '#home', '1'),
(2, 'Web development', 0, '#web-dev', '1'),
(3, 'WordPress Development', 0, '#wp-dev', '1'),
(4, 'About w3school.info', 0, '#w3school-info', '1'),
(5, 'AWS ADMIN', 2, '#', '1'),
(6, 'PHP', 2, '#', '1'),
(7, 'Javascript', 2, '#', '1'),
(8, 'Elastic Ip', 5, '#electic-ip', '1'),
(9, 'Load balacing', 5, '#load-balancing', '1'),
(10, 'Cluster Indexes', 5, '#cluster-indexes', '1'),
(11, 'Rds Db setup', 5, '#rds-db', '1'),
(12, 'Framework Development', 6, '#', '1'),
(13, 'Ecommerce Development', 6, '#', '1'),
(14, 'Cms Development', 6, '#', '1'),
(21, 'News & Media', 6, '#', '1'),
(22, 'Codeigniter', 12, '#codeigniter', '1'),
(23, 'Cake', 12, '#cake-dev', '1'),
(24, 'Opencart', 13, '#opencart', '1'),
(25, 'Magento', 13, '#magento', '1'),
(26, 'Wordpress', 14, '#wordpress-dev', '1'),
(27, 'Joomla', 14, '#joomla-dev', '1'),
(28, 'Drupal', 14, '#drupal-dev', '1'),
(29, 'Ajax', 7, '#ajax-dev', '1'),
(30, 'Jquery', 7, '#jquery-dev', '1'),
(31, 'Themes', 3, '#theme-dev', '1'),
(32, 'Plugins', 3, '#plugin-dev', '1'),
(33, 'Custom Post Types', 3, '#', '1'),
(34, 'Options', 3, '#wp-options', '1'),
(35, 'Testimonials', 33, '#testimonial-dev', '1'),
(36, 'Portfolios', 33, '#portfolio-dev', '1');

3) Php function which help you to get recursive menu.

function get_menu_tree($parent_id) 
{
    global $con;
    $menu = "";
    $sqlquery = " SELECT * FROM menu where status='1' and parent_id='" .$parent_id . "' ";
    $res=mysqli_query($con,$sqlquery);
    while($row=mysqli_fetch_array($res,MYSQLI_ASSOC)) 
    {
           $menu .="<li><a href='".$row['link']."'>".$row['menu_name']."</a>";

           $menu .= "<ul>".get_menu_tree($row['menu_id'])."</ul>"; //call  recursively

           $menu .= "</li>";

    }

    return $menu;
} 

4) Menu which need to print via this function.

<ul class="main-navigation">
<?php echo get_menu_tree(0);//start from root menus having parent id 0 ?>
</ul>