Resources : Resource is a specific variable, it has a reference to an external resource. These variables hold specific handlers to handle files and database connections in respective PHP program.
<?php
// Open a file for reading
Shandle = fopen(“note.txt” , “r”);
var_dump($handle);
echo “<br>";
// Connect to MySQL database server with default setting
Slink = mysql_connect(“localhost” , “root” , “”);
var_dump(Slink);
?>