How do I linkify urls in a string with php?

Question

I have the following string:

"Look on http://www.google.com".

I need to convert it to:

"Look on http://www.google.com"

The original string can have more than 1 URL string.

How do I do this in php?

Thanks

Answer 1

How about this:

$string = "Look on http://www.google.com"
$new_string = ereg_replace("[[:alpha:]]+://[^<>[:space:]]+[[:alnum:]/]","<a href=\"\\0\">\\0</a>", $string);

(I found that here, btw).

Ben

Answer 2

You will need to use regular expressions...

Something like this will help.

$result = preg_replace('/\b(https?|ftp|file):\/\/[-A-Z0-9+&@#\/%?=~_|!:,.;]*[A-Z0-9+&@#\/%=~_|]/i', '<a href="\0">\0</a>', $text);

Answer 3

Have a look at regular expressions. You would then do something like:

$text = preg_replace('@(https?://([-\w\.]+)+(:\d+)?(/([\w/_\.]*(\?\S+)?)?)?)@', '<a href="$1">$1</a>', $text);

Answer 4

lib_autolink does a pretty good job, avoiding pitfalls like extra punctuation after the link and links inside HTML tags:

http://code.iamcal.com/php/lib_autolink/

Answer 5

I found an example which allows for links that include ftp, https and others which seems to work fine for multiple URLs

how-to-detect-urls-in-text-and-convert-to-html-links-php-using-regular-expressions

<?php
// The Regular Expression filter
$pattern = "/(http|https|ftp|ftps)\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?/";

//example text
$text="Example user text with a URL http://www.zero7web.com , second link http://www.didsburydesign.co.uk";

// convert URLs into Links
$text= preg_replace($pattern, "<a href=\"\\0\" rel=\"nofollow\">\\0</a>", $text);

echo $text;
?>

Proabably a good idea to add nofollow to the link too is it's a user submitted value.

Answer 6

Try this...

<?

   function link_it($text)  
   {  
        $text= preg_replace("/(^|[\n ])([\w]*?)([\w]*?:\/\/[\w]+[^ \,\"\n\r\t<]*)/is", "$1$2<a href=\"$3\" >$3</a>", $text);  
        $text= preg_replace("/(^|[\n ])([\w]*?)((www)\.[^ \,\"\t\n\r<]*)/is", "$1$2<a href=\"http://$3\" >$3</a>", $text);
                $text= preg_replace("/(^|[\n ])([\w]*?)((ftp)\.[^ \,\"\t\n\r<]*)/is", "$1$2<a href=\"ftp://$3\" >$3</a>", $text);  
        $text= preg_replace("/(^|[\n ])([a-z0-9&\-_\.]+?)@([\w\-]+\.([\w\-\.]+)+)/i", "$1<a href=\"mailto:$2@$3\">$2@$3</a>", $text);  
        return($text);  
    }


$text = "ini link gue: http://sapua.com <br>
https://sapua.com <br>
anything1://www.sss.com <br>

dua www.google.com <br>
tiga http://www.google.com <br>

ftp.sapua.com <br>

[email protected]


";

print link_it($text);

?>