[RESOLVED] Extracting information from URL?

nickminute

If the url entered was johndoe.domain.com
Using php, Can I pull the 'johndoe' from the url? Can somebody show me how to do this? Either by pulling it into a variable or some other method.

Thank you.

bradgrafelman

You could either strip off the ".domain.com" of $_SERVER['HTTP_HOST'], or you could use [man]substr/man and [man]strpos/man to read everything up until the first period (possibly after using [man]substr_count/man to ensure that there were at lest two periods).

halojoy

I use 2 functions to pick out the eventual subdomain:
[man]parse_url[/man] and [man]explode[/man]

The host name= johndoe.domain.com
has 2 points, and I explode it into 3 pieces by each (.)
Then display the first part.

Now it is not easy to know IF there is a subdomain in hostname.
Normally we can count the pieces, and if there are more than 2
then the first part is a subdomain:
- google.com, 2 pieces = no subdomain
- images.google.com, 3 pieces first is subdomain

But then you have those troublesome british. (you know who counts 15,30,40,game in tennis)
- manchester.co.uk, 3 pieces and still not a subdomain 😕

Here is my script anyway.
You should see what's going on, I hope:

<?php
echo '<pre>';

$url = "http://johndoe.domain.com/manual/en/function.parse-url.php";

$u_parts = parse_url($url);
print_r($u_parts);

$hostname = $u_parts['host']; // take hostname part
echo $hostname.'<br />';

$host_parts = explode('.', $hostname); // explode into 3 pieces
print_r($host_parts);
echo 'Parts= '.count($host_parts).'<br />'; // count parts

echo $host_parts[0]; // the first part=johndoe

?>

nickminute

If I'm trying to extract it from the current url of the current page?

What should I put for the $url variable?

<?php

echo '<pre>'; 

$url = $_SERVER['HTTP_HOST']; // doesn't work

$u_parts = parse_url($url); 
print_r($u_parts); 

$hostname = $u_parts['host']; // take hostname part 
echo $hostname.'<br />'; 

$host_parts = explode('.', $hostname); // explode into 3 pieces 
print_r($host_parts); 
echo 'Parts= '.count($host_parts).'<br />'; // count parts 

echo $host_parts[0]; // the first part=johndoe 

?>

nickminute

Array
(
[path] => www.test.domain.com
)
Array
(
[0] =>
)
Parts= 1

<?php 
echo '<pre>'; 

$url = $_SERVER['HTTP_HOST'];

$u_parts = parse_url($url); 
print_r($u_parts); 

$hostname = $u_parts['host']; // take hostname part 
echo $hostname.'<br />'; 

$host_parts = explode('.', $hostname); // explode into 3 pieces 
print_r($host_parts); 
echo 'Parts= '.count($host_parts).'<br />'; // count parts 

echo $host_parts[0]; // the first part=johndoe 

?>

nickminute

This is the only way I could get it to work because I couldn't get the 'http://' into the $url variable. 🙁

This works, unless the user enters a 'www.' infront of the subdomain! For example:

test.domain.com // WORKS!
www.test.domain.com // NO WORKS!


<?php 
echo '<pre>'; 


$test = $_SERVER['HTTP_HOST'];
$header = "http://";

echo $test;
echo "<br />";

$url = $header . $test;

echo $url;
echo "<br />";

// $url = "http://johndoe.domain.com/index.html"; 

$u_parts = parse_url($url); 
print_r($u_parts); 

$hostname = $u_parts['host']; // take hostname part 
echo $hostname.'<br />'; 

$host_parts = explode('.', $hostname); // explode into 3 pieces 
print_r($host_parts); 
echo 'Parts= '.count($host_parts).'<br />'; // count parts 

echo $host_parts[0]; // the first part=johndoe 

?>