What is resource data type in php?

Question

Give an example of implementation of resource data type in php

Answer 1

A resource is a special variable, holding a reference to an external resource.

Resource variables typically hold special handlers to opened files and database connections.

Ex:

<?php
// Open a file for reading
$handle = fopen("note.txt", "r");
var_dump($handle);
echo "<br>";

// Connect to MySQL database server with default setting
$link = mysql_connect("localhost", "root", "");
var_dump($link);
?>

Reference# https://www.tutorialrepublic.com/php-tutorial/php-data-types.php