Insertion & Selection of data in PHP

Insertion:

<?php

if(isset($_POST['btnSave']))

{

$MN = $_POST['txtA'];

$RD = $_POST['txtB'];

$RT = $_POST['Rating'];

$A = mysql_connect("LocalHost","root","") or die("Error in MySQL Connection"); //Step-1: Open Connection

mysql_select_db("MovieDB",$A) or die ("Error in Data Base"); //Step-2: Select Data Base.

mysql_query("Insert into tblMovies values ('','$MN','$RD','$RT')",$A) or die ("Error in Insert Query"); //Step-3: Run Query

mysql_close($A); //Step-4: Close DataBase.

echo "Data Saved.";

}

?>

Selection:

<?php

$A = mysql_connect("LocalHost","root","") or die("Error in MySQL Connection"); //Step-1: Open Connection

mysql_select_db("MovieDB",$A) or die ("Error in Data Base"); //Step-2: Select Data Base.

$B = mysql_query("Select * from tblMovies",$A) or die ("Error in Insert Query"); //Step-3: Run Query

$T = mysql_num_rows($B);

echo "Total Rows: $T <br>";

for($a=0; $a<$T;  $a++)

{

$R = mysql_fetch_array($B);

echo "<tr>";

echo "<td>$R[0]</td>"; //MID

echo "<td>$R[1]</td>"; //MovieName

echo "<td>$R[2]</td>"; //ReleaseDate

echo "<td>$R[3]</td>"; //Rating

echo "<td align=center><font color=Blue><img src='Movies/$R[0].jpg' width=70 height=70 title='$R[1]' border=5></font></td>"; //Images

echo "</tr>";

}

mysql_close($A); //Step-4: Close DataBase.

?>

Form:

<h2><strong>Fill Movie Information</strong></h2>

<Form action="Index.php" Method="POST">

<table border=1 cellspacing=5 cellpadding=5>

<tr>

<td><input type=Text name=txtA PlaceHolder="Enter Movie Name" Required=Required></td>

</tr>

<tr>

<td><input type=Text name=txtB PlaceHolder="Enter Release Date" Required=Required></td>

</tr>

<tr>

<td><Select name=Rating Style=Width:145>

<option>Select Rating</option>

<option>1-Star</option>

<option>2-Star</option>

<option>3-Star</option>

<option>4-Star</option>

</Select></td>

</tr>

<tr>

<td align=right><input type=Submit name=btnSave Value=Save></td>

</tr>

</table>

</Form>