Module introduction to the website backend - Category management (3) Add category

This section will introduce a very important link, classification management, which is the core of writing a website.

What is classification management? Classification management refers to classifying things into categories, and applying different or similar management methods to different categories.

After the background traversal comes out, we need to write a function to add categories. The code is as follows:

<?php 
session_start (); 
  require_once("../config/config.php");
  if($_POST){
    $cate_name = $_POST['cate_name'];
    $pid = $_POST['pid'];
    $sql = "INSERT INTO `cate` (`cate_name`,`pid`,`rank`) values ('$cate_name','$pid',1)";
    mysql_query($sql);
  }
 $sql = "SELECT * FROM cate"; 
$result = mysql_query($sql); 
if ($result && mysql_num_rows($result)) {
      while ($row = mysql_fetch_assoc($result)) {
        $data[] = $row;
      }
    }
 ?>