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Navigate through records

<?php 

// Variables for navigating between previous and next record id 

$previd = $id-1; 
$nextid = $id+1; 

// Your database connection code 

$dbcnx = mysql_connect('localhost:', 'mysql','yourpass')   
or die("Error Occurred"); 
          
mysql_selectdb("YourDB"); 

$query = "SELECT * FROM yourtable WHERE id='$id'"; 
$result = mysql_query($query, $dbcnx); 
$row = mysql_fetch_array($result); 

// Checking and displaying data 

If (($id > 0) && ($id <= sizeof($row))) { 

        echo $row['your array']; 
        echo "<a href=\"page.php?id=$previd\">Previous</a>   
         <a href=\"page.php?id=$nextid\">Next</a>"; 

} else { 
          
          if ($id < 1) { 
                echo "Beginning of Record Set"." "; 
                echo "<a href=\"page.php?id=$nextid\">Next</a>"; 
        } else { 
                echo "End of Record Set"." "; 
                echo "<a href=\"page.php?id=$previd\">Previous</a>"; 
        } 
} 
?>