How can we write a PHP script to free the cursor memory associated with MySQL results?

We know that PHP uses the msql_free_result() function to release the cursor memory related to MySQL results. To illustrate this, we are using the following example -

Example

In this example, we are writing the following PHP script that will free the memory after fetching the records from the table named ' tutorial_tbl'.

<?php
   $dbhost = &#39;localhost:3036&#39;;
   $dbuser = &#39;root&#39;;
   $dbpass = &#39;rootpassword&#39;;
   $conn = mysql_connect($dbhost, $dbuser, $dbpass);
   
   if(! $conn )  {
      die(&#39;Could not connect: &#39; . mysql_error());
   }
   
   $sql = &#39;SELECT tutorial_id, tutorial_title, tutorial_author, submission_date
      FROM tutorials_tbl&#39;;
   mysql_select_db(&#39;TUTORIALS&#39;);
   $retval = mysql_query( $sql, $conn );

   if(! $retval ) {
      die(&#39;Could not get data: &#39; . mysql_error());
   }

   while($row = mysql_fetch_array($retval, MYSQL_NUM)) {
      echo "Tutorial ID :{$row[0]} <br> ".
         "Title: {$row[1]} <br> ".
         "Author: {$row[2]} <br> ".
         "Submission Date : {$row[3]} <br> ".
         "--------------------------------<br>";
   }
   mysql_free_result($retval);
   echo "Fetched data successfully</p><p>";
   mysql_close($conn);
?>

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