php - Get domain with its subdomain from url -
i'm using function domain , subdomain string. if string expected format, returns null
function getdomainfromurl($url) { $host = parse_url($url, php_url_host); return preg_replace('/^www\./', '', $host); } $url = "http://abc.example.com/" -> abc.example.com | ok $url = "http://www.example.com/" -> example.com | ok $url = "abc.example.com" -> fails!
the issue parse_url returning false. check make sure response before trying use otherwise $host
empty.
<?php function getdomainfromurl($url) { $host = (parse_url($url, php_url_host) != '') ? parse_url($url, php_url_host) : $url; return preg_replace('/^www\./', '', $host); } echo getdomainfromurl("http://abc.example.com/") . "\n"; echo getdomainfromurl("http://www.example.com/") . "\n"; echo getdomainfromurl("abc.example.com");
output:
abc.example.com
example.com
abc.example.com
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