如何从文本字符串中获取URL？

Question

I have a string that conaint URLs and other texts. I want to get all the URLs in to $matches array. But the following code wouldn't get all the URLs in to $matches array:

$matches = array();
$text = "soundfly.us schoollife.edu hello.net some random news.yahoo.com text http://tinyurl.com/9uxdwc some http://google.com random text http://tinyurl.com/787988 and others will en.wikipedia.org/wiki/Country_music URL";
preg_match_all('$\b(https?|ftp|file)://[-A-Z0-9+&@#/%?=~_|!:,.;]*[-A-Z0-9+&@#/%=~_|]$i', $text, $matches);
print_r($matches);

Above code will get:

http://tinyurl.com/9uxdwc
http://google.com
http://tinyurl.com/787988

.

but misses the following 4 URLs:

schoollife.edu 
hello.net 
news.yahoo.com
en.wikipedia.org/wiki/Country_music

Can you please tell me with an example, how can I modify above code to get all the URLs

Answer 1

Is this what you need?

$matches = array();
$text = "soundfly.us schoollife.edu hello.net some random news.yahoo.com text http://tinyurl.com/9uxdwc some http://google.com random text http://tinyurl.com/787988 and others will en.wikipedia.org/wiki/Country_music URL";
preg_match_all('$\b((https?|ftp|file)://)?[-A-Z0-9+&@#/%?=~_|!:,.;]*\.[-A-Z0-9+&@#/%=~_|]+$i', $text, $matches);
print_r($matches);

I made the protocol part optionnal, add the use of a dot spliting the domain and the TLD and a "+" to get the full string after that dot (TLD + extra informations)

Result is:

[0] => soundfly.us 
[1] => schoollife.edu 
[2] => hello.net 
[3] => news.yahoo.com 
[4] => http://tinyurl.com/9uxdwc 
[5] => http://google.com 
[6] => http://tinyurl.com/787988 
[7] => en.wikipedia.org/wiki/Country_music

Also works with IP address because of the mandatory presence of a dot into. Tested with string "192.168.0.1" and "192.168.0.1/test/index.php"