PHP find all links in the text

Question

I want to find all links in the text like this:

Test text http://hello.world Test text 
http://google.com/file.jpg Test text https://hell.o.wor.ld/test?qwe=qwe T         


        

Answer 1

Works like a charm. use this.

$str= "Test text http://hello.world";
preg_match_all('/\b(?:(?:https?|ftp|file):\/\/|www\.|ftp\.)[-A-Z0-9+&@#\/%=~_|$?!:,.]*[A-Z0-9+&@#\/%=~_|$]/i', $str, $result, PREG_PATTERN_ORDER);
print_r($result[0]);

Answer 2

<?php

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

// The Text you want to filter for urls
$text = "The text you want to filter goes here. http://google.com";

// Check if there is a url in the text
if(preg_match($reg_exUrl, $text, $url)) {

       // make the urls hyper links
       echo preg_replace($reg_exUrl, "<a href="{$url[0]}">{$url[0]}</a> ", $text);

} else {

       // if no urls in the text just return the text
       echo $text;

}
?>

Reference:http://css-tricks.com/snippets/php/find-urls-in-text-make-links/

Answer 3

The suggested answers are great, but one of them miss www. case, the other http://

So, let's combine all of those:

$text = Test text http://hello.world Test text 
http://google.com/file.jpg Test text https://hell.o.wor.ld/test?qwe=qwe Test text 
test text http://test.test/test

preg_match_all('/(((http|https|ftp|ftps)\:\/\/)|(www\.))[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\:[0-9]+)?(\/\S*)?/', $text, $results, PREG_PATTERN_ORDER);

print_r($results[0]);

The return value for PREG_PATTERN_ORDER will be Array of Arrays (results) so that $results[0] is an array of full pattern matches, $results[1] is an array of strings matched by the first parenthesized subpattern, and so on.

Answer 4

I'd go with something simple like ~[a-z]+://\S+~i

• starts with protocol [a-z]+://
• \S+ followed by one or more non-whitespaces where \S is a shorthand for [^ \t\r\n\f]
• used modifier i (PCRE_CASELESS) (possibly not really necessery)

---

So it could look like this:

$pattern = '~[a-z]+://\S+~';

$str = 'Test text http://hello.world Test text 
http://google.com/file.jpg Test text https://hell.o.wor.ld/test?qwe=qwe Test text 
test text http://test.test/test';

if($num_found = preg_match_all($pattern, $str, $out))
{
  echo "FOUND ".$num_found." LINKS:\n";
  print_r($out[0]);
}

outputs:

FOUND 4 LINKS:
Array
(
    [0] => http://hello.world
    [1] => http://google.com/file.jpg
    [2] => https://hell.o.wor.ld/test?qwe=qwe
    [3] => http://test.test/test
)

Test on eval.in

Answer 5

Not regexp, but finds it all and makes sure that they are not already encompassed in a tag already. It also checks to make sure that the link isn't encapsulated in (), [], "" or anything else with an open and close.

$txt = "Test text http://hello.world Test text 
http://google.com/file.jpg Test text https://hell.o.wor.ld/test?qwe=qwe Test text 
test text http://test.test/test <a href=\"http://example.com\">I am already linked up</a>
It was also done in 1927 (http://test.com/reference) Also check this out:http://test/index&t=27";
$holder = explode("http",$txt);
for($i = 1; $i < (count($holder));$i++) {
    if (substr($holder[$i-1],-6) != 'href="') { // this means that the link is not alread in an a tag.
        if (strpos($holder[$i]," ")!==false) //if the link is not the last item in the text block, stop at the first space
            $href = substr($holder[$i],0,strpos($holder[$i]," "));
        else                                //else it is the last item, take it
            $href = $holder[$i];
        if (ctype_punct(substr($holder[$i-1],strlen($holder[$i-1])-1)) && ctype_punct(substr($holder[$i],strlen($holder[$i])-1)))
            $href = substr($href,0,-1);     //if both the fron and back of the link are encapsulated in punctuation, truncate the link by one
        $holder[$i] = implode("$href\" target=\"_blank\" class=\"link\">http$href</a>",explode($href,$holder[$i]));
        $holder[$i-1] .= "<a href=\"";
    }
}
$txt = implode("http",$holder);

echo $txt;

Output:

Test text <a href="http://hello.world" target="_blank" class="link">http://hello.world</a> Test text 
<a href="http://google.com/file.jpg" target="_blank" class="link">http://google.com/file.jpg</a> Test text <a href="https://hell.o.wor.ld/test?qwe=qwe" target="_blank" class="link">https://hell.o.wor.ld/test?qwe=qwe</a> Test text 
test text <a href="http://test.test/test" target="_blank" class="link">http://test.test/test</a> <a href="http://example.com">I am already linked up</a>
It was also done in 1927 (<a href="http://test.com/reference" target="_blank" class="link">http://test.com/reference</a>) Also check this out:<a href="http://test/index&amp;t=27" target="_blank" class="link">http://test/index&amp;t=27</a>

Answer 6

function turnUrlIntoHyperlink($string){
    //The Regular Expression filter
    $reg_exUrl = "/(?i)\b((?:https?:\/\/|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}\/)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:'\".,<>?«»“”‘’]))/";

    // Check if there is a url in the text
    if(preg_match_all($reg_exUrl, $string, $url)) {

        // Loop through all matches
        foreach($url[0] as $newLinks){
            if(strstr( $newLinks, ":" ) === false){
                $link = 'http://'.$newLinks;
            }else{
                $link = $newLinks;
            }

            // Create Search and Replace strings
            $search  = $newLinks;
            $replace = '<a href="'.$link.'" title="'.$newLinks.'" target="_blank">'.$link.'</a>';
            $string = str_replace($search, $replace, $string);
        }
    }

    //Return result
    return $string;
}