PHP Check if url in username and replace it - php

Question

i want to check if a user has a domain or website in his name.
Much times, user will make advertise for own or other sites on that way.
So i want to replace the URL than with *
I found that
$url = 'Testusername google.com';
$regex = "((https?|ftp)\:\/\/)?"; // SCHEME
$regex .= "([a-z0-9+!*(),;?&=\$_.-]+(\:[a-z0-9+!*(),;?&=\$_.-]+)?#)?"; // User and Pass
$regex .= "([a-z0-9-.]*)\.([a-z]{2,3})"; // Host or IP
$regex .= "(\:[0-9]{2,5})?"; // Port
$regex .= "(\/([a-z0-9+\$_-]\.?)+)*\/?"; // Path
$regex .= "(\?[a-z+&\$_.-][a-z0-9;:#&%=+\/\$_.-]*)?"; // GET Query
$regex .= "(#[a-z_.-][a-z0-9+\$_.-]*)?"; // Anchor
if(preg_match("/^$regex$/i", $url)) // `i` flag for case-insensitive
{
$url = str_replace($url, $url, '*');
echo $url;
return true;
} else {
echo $url;
}
It works good to find the url, but how to replace only the domain in that name to * and not everything?
So i want
Testusername *

Answer 1

To replace a regular expression, use preg_replace instead of preg_match and use groups to extract only the valid parts of the username.
$username = 'Testusername google.com';
$regex = '/^(.*?)';
$regex .= "((https?|ftp)\:\/\/)?"; // SCHEME
$regex .= "([a-z0-9+!*(),;?&=\$_.-]+(\:[a-z0-9+!*(),;?&=\$_.-]+)?#)?"; // User and Pass
$regex .= "([a-z0-9-.]*)\.([a-z]{2,3})"; // Host or IP
$regex .= "(\:[0-9]{2,5})?"; // Port
$regex .= "(\/([a-z0-9+\$_-]\.?)+)*\/?"; // Path
$regex .= "(\?[a-z+&\$_.-][a-z0-9;:#&%=+\/\$_.-]*)?"; // GET Query
$regex .= "(#[a-z_.-][a-z0-9+\$_.-]*)?"; // Anchor
$regex .= '(.*?)$/i';
$username = preg_replace($regex, '$1 * $13', $username);
echo $username; // Testusername *
If you need to know that the username contained a url and a replacement was made, you can use the $count argument to determine how many replacements occurred.
$count = 0;
$username = preg_replace($regex, '$1 * $13', $username, -1, $count);
if ($count > 0) {
// url replaced in username
}

Answer 2

Try using preg_replace() like so:
$url = 'Testusername google.com';
$regex = "((https?|ftp)\:\/\/)?"; // SCHEME
$regex .= "([a-z0-9+!*(),;?&=\$_.-]+(\:[a-z0-9+!*(),;?&=\$_.-]+)?#)?"; // User and Pass
$regex .= "([a-z0-9-.]*)\.([a-z]{2,3})"; // Host or IP
$regex .= "(\:[0-9]{2,5})?"; // Port
$regex .= "(\/([a-z0-9+\$_-]\.?)+)*\/?"; // Path
$regex .= "(\?[a-z+&\$_.-][a-z0-9;:#&%=+\/\$_.-]*)?"; // GET Query
$regex .= "(#[a-z_.-][a-z0-9+\$_.-]*)?"; // Anchor
echo preg_replace("/$regex$/i", '*', $url);
more about preg_replace can be found here

Answer 3

this should do it - you need to separate the username and url, as well as a few other changes.....
$username = 'Testusername google.com';
$regex = "((https?|ftp)\:\/\/)?"; // SCHEME
$regex .= "([a-z0-9+!*(),;?&=\$_.-]+(\:[a-z0-9+!*(),;?&=\$_.-]+)?#)?"; // User and Pass
$regex .= "([a-z0-9-.]*)\.([a-z]{2,3})"; // Host or IP
$regex .= "(\:[0-9]{2,5})?"; // Port
$regex .= "(\/([a-z0-9+\$_-]\.?)+)*\/?"; // Path
$regex .= "(\?[a-z+&\$_.-][a-z0-9;:#&%=+\/\$_.-]*)?"; // GET Query
$regex .= "(#[a-z_.-][a-z0-9+\$_.-]*)?"; // Anchor
if(preg_match("/^$regex$/i", $username,$matches)) // `i` flag for case-insensitive
{
foreach($matches as $key => $url){
$username = str_replace($url, '*', $username);
}
echo $username;
return true;
} else {
echo $username;
}