Question

Which one of the following statements can be used to establish port 80 connection with www.nachi.com?

(a) fsockopen(“www.nachi.com”, 80);

(b) sockopen(80,”www.nachi.com”);

(c) fsockopen(80,”www.nachi.com”);

(d) sockopen(“www.nachi.com”, 80);

The question was asked in an interview for internship.

I'm obligated to ask this question of Networking with PHP topic in division File and Session Handling in PHP of PHP

Answer 1

The correct answer is:

(a) fsockopen("www.nachi.com", 80);

In PHP, the fsockopen() function is used to open a network socket connection to a specified host and port. The correct syntax is:

php

Copy code

fsockopen("hostname", port);

• (b) sockopen(80,"www.nachi.com");: This is incorrect because sockopen() is not a valid PHP function.
• (c) fsockopen(80,"www.nachi.com");: The arguments are in the wrong order. The hostname should come first, followed by the port number.
• (d) sockopen("www.nachi.com", 80);: Again, sockopen() is not a valid PHP function.

So, the correct function to establish a connection to port 80 on www.nachi.com is fsockopen("www.nachi.com", 80);.