my test code

class Main{ } // class

class ClassName extends AnotherClass implements Interface{ } // class extends  AnotherClass  Interface

$main = new Main(); // class object

public function __construct(){ }

include_once "system/libs/Main.php";

include "system/libs/Main.php";

empty($key)

$data = array();

$key = $_REQUEST['key'];

$url =  $_GET['url'];

$url =  isset($_GET['url']) ? $_GET['url'] : NULL;

$url = rtrim($url,'/');

$url = explode('/',$url);

header('location: https://www.google.com');

header("location: ".Home_URL."?url=Index");

$content = $value['content'] ;

$content = substr($content, 0, 200);

echo $content;

define('BASE_URL', 'http://localhost/mvc/index.php?url=Index');

INNER JOIN

SELECT post.*, category.name FROM post INNER JOIN category ON post.cat = category.id WHERE category.id = 1 

SELECT post.*, category.name FROM post INNER JOIN category ON post.catname = category.name WHERE category.name = 1

SELECT post.*, category.name FROM post INNER JOIN category ON post.catname = category.name WHERE category.name = 'edu'

$sql    = "SELECT * FROM $tablepost WHERE title LIKE '%$key%' OR content LIKE '%$key%'"; 

$sql    = "SELECT * FROM $tablepost WHERE cat =  $cat"; 

 

rowCount()

$postDelete = mysqli_query($con,"select Coll_ID from tb_product_add where Coll_Product_Name_Solug = '$Post_nAME'");

$postDelete_row = mysqli_num_rows($postDelete); // rowCount()

if(!($_POST)){

header('location: https://www.google.com');

}else{ Ok Code Hare }

if (!$_POST['submit']) {

     header("Location: http://localhost/mvc/index.php?url=Admin");

}else{ Ok Code Hare }

if (Session::get("level")!=2 && Session::get("level")!=3) {

}