PHP file to execute everything

db.php

<?php 
	//Creating a connection
  $dbname = $_GET["dbname"];
	$con = mysqli_connect("localhost:3306","root","",$dbname);
	 
    if (mysqli_connect_errno())
    {
       echo "Failed to connect to MySQL: " . mysqli_connect_error();
    }
	/*get the sql query to execute*/	
	$sql = $_GET["sql"];
	
	$result = mysqli_query($con ,$sql);
	
	while ($row = mysqli_fetch_assoc($result)) {
		
		$array[] = $row;
		
	}
	header('Content-Type:Application/json');
	
	echo json_encode($array);
 
    mysqli_free_result($result);
 
    mysqli_close($con);
  
 ?>