How to Extract Domain Names from URLs in PHP?

Extracting Domain Names from URLs in PHP

Extracting the domain name (not subdomain) from a URL can be a task that requires careful consideration of various URL formats. To address this challenge, PHP provides the parse_url() function, which enables the extraction of various URL components, including the host.

To obtain the domain name, follow these steps:

1. Parse the URL: Using parse_url($url), extract the $host from the URL.
2. Separate Host Name: Split the host into an array ($host_names) based on periods.
3. Get Bottom Host Name: Subtract 2 from the array count to get the second to last string, representing the host name (e.g., "example").
4. Get TLD: Subtract 1 from the array count to get the last string, representing the TLD (e.g., "com").
5. Combine Host and TLD: Concatenate the host name and TLD with a period (e.g., "example.com").

This method may not be the most elegant, but it efficiently extracts the domain name from complex URL formats, including those with subdomains, TLDs, and additional path components.

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