extract domain name from the url using regular expression

Question: How to extract domain name from a url using regular expressions

Answer:

preg_match('@^(?:http://)?([^/]+)@i',"http://blogger.com", $matches);

$host = $matches[1];

// get last two segments of host name

preg_match('/[^.]+\.[^.]+$/', $host, $matches);

echo "domain name is: {$matches[0]}\n";

The output is

domain name is: blogger.com

What is array in php

Question: What is array in php and how to create an array in php?

Answer: In php array is an ordered map. It contains values and keys.

To create an array we need to use array keyword

Example:

$a= array('php','interview','questions','answers');

This creates simple array.