room.php

<?php

			$servername = "localhost";
			$username = "root";
			$password = "";
			$dbname = "DBMS";

			try {
				$conn = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
				$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
				$sql = "UPDATE STUDENT SET ROOM_NO='$_POST[room]' WHERE STU_ID='$_POST[sid]'";
				$stmt = $conn->prepare($sql);
				$stmt->execute();
				echo $stmt->rowCount() . "<table style='border: solid 1px black;'>";
 echo "<tr><th>Id</th><th>Firstname</th><th>Lastname</th><th>FATHER'S NAME</th><th>DOB</th><th>BRANCH</th><th>CGPA</th><th>HOSTEL ID</th><th>MESS ID</th><th>ROOM NO</th></tr>";

class TableRows extends RecursiveIteratorIterator { 
    function __construct($it) { 
        parent::__construct($it, self::LEAVES_ONLY); 
    }

    function current() {
        return "<td style='width: 150px; border: 1px solid black;'>" . parent::current(). "</td>";
    }

    function beginChildren() { 
        echo "<tr>"; 
    } 

    function endChildren() { 
        echo "</tr>" . "\n";
    } 
}  $stmt = $conn->prepare("SELECT * FROM STUDENT"); 
    $stmt->execute();
     $result = $stmt->setFetchMode(PDO::FETCH_ASSOC); 
    foreach(new TableRows(new RecursiveArrayIterator($stmt->fetchAll())) as $k=>$v) { 
        echo $v;
    }
}
    
catch(PDOException $e)
    {
    echo $sql . "<br>" . $e->getMessage();
    }

$conn = null;
?>