php - Converting Array data to

width PHP

Question

In MySQL my table appears like this:

CREATE TABLE IF NOT EXISTS `tbl_category` (
  `id` int(6) NOT NULL auto_increment,
  `parent_id` int(4) NOT NULL default '0',
  `name` varchar(255) NOT NULL,
  PRIMARY KEY  (`id`),
  KEY `parent_id` (`parent_id`)
) ENGINE=MyISAM  DEFAULT CHARSET=utf8;


INSERT INTO `tbl_category` (`id`, `parent_id`, `name`) VALUES
(1, 0, 'Category 1'),
(2, 0, 'Category 2'),
(3, 0, 'Category 3'),
(4, 1, 'Category 1. 1'),
(5, 1, 'Category 1. 2'),
(6, 1, 'Category 1. 3'),
(7, 4, 'Category 1. 1. 1'),
(8, 4, 'Category 1. 1. 2'),
(9, 4, 'Category 1. 1. 3');

My array

$arrCategories = array(
    array("id" => 1, "parent_id" => 0, "name" => "Category 1", "children" => array()
                array("id" => 4, "parent_id" => 1, "name" => "Category 1. 1", "children" => array()
                         array("id" => 7, "parent_id" => 4, "name" => "Category 1. 1. 1", "children" => array()),
                         array("id" => 8, "parent_id" => 4, "name" => "Category 1. 1. 2", "children" => array()),
                         array("id" => 9, "parent_id" => 4, "name" => "Category 1. 1. 3", "children" => array())
                                ),
                array("id" => 5, "parent_id" => 1, "name" => "Category 1. 2", "children" => array()),
                array("id" => 6, "parent_id" => 1, "name" => "Category 1. 3", "children" => array())        
        ),
    array("id" => 2, "parent_id" => 0, "name" => "Category 2", "children" => array()),
    array("id" => 3, "parent_id" => 0, "name" => "Category 3", "children" => array())
);

The array output

How do I make it width PHP ?

<ul>
 <li>Category 1
  <ul>
   <li>Category 1. 1
    <ul>
     <li>Category 1. 1. 1</li>
     <li>Category 1. 1. 2</li>
     <li>Category 1. 1. 3</li>
    </ul>
   </li>
   <li>Category 1. 2</li>
   <li>Category 1. 3</li>
  </ul>
 </li>
 <li>Category 2</li>
 <li>Category 3</li>
</ul>

This is does not work correctly

<?php
echo "    <ul>\n";
foreach ($categories as $category) {
echo "     <li>".$category['ad'];

if ($category['children']) {
echo "      <ul>\n";
foreach ($category['children'] as $child) {
echo "       <li>".$child['ad']."</li>\n";
}
echo "      </ul>\n";
}
echo "     </li>\n";
}
echo "    </ul>\n";
?>

Thanks works now for me thats functions... http://ideone.com/u2GNV

But i think not valid ul and li tags...

http://ideone.com/u2GNV results for me

<ul>
 <li>Category 1
  <ul>
   <li>Category 1. 1
    <ul>
     <li>Category 1. 1. 1</li>
    </ul>
    <ul>
     <li>Category 1. 1. 2</li>
    </ul>
    <ul>
     <li>Category 1. 1. 3</li>
    </ul>
   </li>
  </ul>

  <ul>
   <li>Category 1. 2</li>
  </ul>

  <ul>
   <li>Category  1. 3</li>
  </ul>
 </li>
</ul>

<ul>
 <li>Category 2</li>
</ul>

<ul>
 <li>Category 3</li>
</ul>

i think valid w3 code

<ul>
 <li>Category 1
  <ul>
   <li>Category 1. 1
    <ul>
     <li>Category 1. 1. 1</li>
     <li>Category 1. 1. 2</li>
     <li>Category 1. 1. 3</li>
    </ul>
   </li>
   <li>Category 1. 2</li>
   <li>Category 1. 3</li>
  </ul>
 </li>
 <li>Category 2</li>
 <li>Category 3</li>
</ul>

score 5 · Accepted Answer

您可以创建一个函数来将所有数组解析为一个menu like块并使用递归：

对于该数组：

function printMenu($array){
    foreach($array as $item){
        if(is_array($item) && isset($item['name'])){
            echo "<ul>\n";

                if(is_array($item['children'])){
                    echo "<li>".$item['name'];
                    printMenu($item);
                    echo "</li>\n";
                } else {
                    echo "<li>".$item['name']."</li>\n";
                }

            echo "</ul>\n\n";
        }
    }
}

来自 mysql 资源（基于您的表）：

$db = new PDO('mysql:host=localhost;dbname=test', 'root', '', array(PDO::ATTR_EMULATE_PREPARES => false, PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION));


function printMenu($array){
    foreach($array as $item){
        if(is_array($item) && isset($item['name'])){
            echo "<ul>\n";
                if(getChildren($item['id'], false)){
                    echo "<li>".$item['name'];
                    printMenu(getChildren($item['id'], true));
                    echo "</li>\n";
                } else {
                    echo "<li>".$item['name']."</li>\n";
                }

            echo "</ul>\n\n";
        }
    }
}

function getChildren($id, $return = false){
    global $db;
    $stmt = $db->prepare("SELECT * FROM `tbl_category` WHERE `parent_id` = :parent_id");
    $stmt->execute(array(':parent_id' => $id));
    $num = $stmt->rowCount();
    if($num){
        if($return){
            $row = $stmt->fetchAll(PDO::FETCH_ASSOC);
            return $row;
        }
        return true;
    }
    return false;
}


$query = "SELECT * FROM `tbl_category` WHERE `parent_id` = 0";
$stmt = $db->query($query);
$row = $stmt->fetchAll(PDO::FETCH_ASSOC);
printMenu($row);

结果：

第一类
- 类别 1. 1
  - 类别 1. 1. 1
  - 类别 1. 1. 2
  - 类别 1. 1. 3
- 类别 1. 2
- 类别 1. 3

第 2 类

第 3 类

php - Converting Array data to width PHP

In MySQL my table appears like this:

My array

The array output

How do I make it width PHP ?

This is does not work correctly

1 回答 1

Related

Reference

php - Converting Array data to

width PHP