How to extract domain names from text using PHP?

Question

How can I extract the domain name from some text using PHP?

For example, my text should be something like following:

[amr]http://www.example1.com[amr]4[amr]af[amrlf]7
[amr]http://www.example1.com[amr]2[amr]ad[amrlf]22
[amr]http://www.example1.net[amr]1[amr]ad[amrlf]26
[amr]http://www.example1.info[amr]3[amr]af[amrlf]31

Now I just want to get the domain name from this without http:// or www.

Can anyone help me on this?

Your text doesn't make any sense. What are "[amr]" and "[amrlf]" supposed to represent? — Colin Fine, Dec 13 '11 at 13:07
possible duplicate of [Simple regex for domain names](http://stackoverflow.com/questions/7742010/simple-regex-for-domain-names) — mario, Dec 13 '11 at 13:23
This just a small portion of a text from a file and it can be anything like [amr], 2[amr],ad[amrlf],22[amr] and my requirement is to get the domain name from that text. — Jayesh Ambali, Dec 13 '11 at 13:39
@ Colin Fine That can be anything(special characters, numeric or alphabets) after the valid domain and I guess it makes sense. — Jayesh Ambali, Sep 07 '12 at 07:04
@ mario The link you mentioned here is not the duplicate of my question. Please do check the question before making comments — Jayesh Ambali, Sep 07 '12 at 07:07

score 0 · Answer 1 · answered Feb 22 '13 at 08:33

0

Here is another solution :)

$url  = 'http://google.com?arg=value#anchor';
print_r(parse_url($url));

answered Feb 22 '13 at 08:33

Prasanth Bendra

31,145
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score 0 · Accepted Answer · answered Dec 13 '11 at 13:09

0

How about:

$str = '[amr]http://www.example1.com[amr]4[amr]af[amrlf]7[amr]http://www.example1.com[amr]2[amr]ad[amrlf]22[amr]http://www.example1.net[amr]1[amr]ad[amrlf]26[amr]http://www.example1.info[amr]3[amr]af[amrlf]31';
preg_match_all('#http://(?:www\.)?(.*?)\[amr#', $str, $matches);
print_r($matches[1]);

output:

Array
(
    [0] => example1.com
    [1] => example1.com
    [2] => example1.net
    [3] => example1.info
)

answered Dec 13 '11 at 13:09

Toto

89,455
62
89
125

Thank you very much M42.This regular expression is working fine with the above string, but not with my file of text(This text is from a file and Iam reading the file contents to a variable). I just copied the portion of the string in my question. Do I need to upload the file ? – Jayesh Ambali Dec 13 '11 at 13:42
If the file is not too big, you can read it in a string and then apply the `preg_match_all` command on this string. If it's too big, process line by line. – Toto Dec 13 '11 at 13:47
File is not so big, just 2 MB of size. Yes I did exactly what you said in your comment, I took the file contents as a string(using file_get_contents()) and applied the regular expression provided by you. But no luck. Once again thanks for giving reply. About file upload in the first comment : I asked whether stackoverflow has any option to upload the file with the question, so that I can upload that file to give more clarification. – Jayesh Ambali Dec 13 '11 at 13:52
What is not working? What did you get? Edit your question and say what you obtain. – Toto Dec 13 '11 at 13:58
It is working fine now. Earlier the code was like this $file = file_get_contents('file2.txt'); preg_match_all('#http://(?:www\.)?(.*?)\[amr#', $file, $matches); echo '
```
';
     print_r($matches[1]); and this was not working for me.
         
     Then I modified the code by giving whole string to $file in code itself and it is working fine now.
```
– Jayesh Ambali Dec 13 '11 at 14:10

How to extract domain names from text using PHP?

2 Answers2