Как найти ссылку на странице php

I have this text:

$string = "this is my friend's website http://example.com I think it is coll";

How can I extract the link into another variable?

I know it should be by using regular expression especially preg_match() but I don’t know how?

If the text you extract the URLs from is user-submitted and you’re going to display the result as links anywhere, you have to be very, VERY careful to avoid XSS vulnerabilities, most prominently «javascript:» protocol URLs, but also malformed URLs that might trick your regexp and/or the displaying browser into executing them as Javascript URLs. At the very least, you should accept only URLs that start with «http», «https» or «ftp».

There’s also a blog entry by Jeff where he describes some other problems with extracting URLs.

You could do like this..

<?php
$string = "this is my friend's website http://example.com I think it is coll";
echo explode(' ',strstr($string,'http://'))[0]; //"prints" http://example.com

answered Dec 24, 2013 at 6:02

preg_match_all ("/a[s]+[^>]*?href[s]?=[s"']+".
                "(.*?)["']+.*?>"."([^<]+|.*?)?</a>/",
                $var, &$matches);

$matches = $matches[1];
$list = array();

foreach($matches as $var)
{    
    print($var."<br>");
}

answered Sep 1, 2011 at 12:54

You could try this to find the link and revise the link (add the href link).

$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://example.com";

if(preg_match($reg_exUrl, $text, $url)) {

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

} else {

       echo "No url in the text";

}

refer here: http://php.net/manual/en/function.preg-match.php

Here is a function I use, can’t remember where it came from but seems to do a pretty good job of finding links in the text. and making them links.

You can change the function to suit your needs. I just wanted to share this as I was looking around and remembered I had this in one of my helper libraries.

function make_links($str){

  $pattern = '(?xi)b((?:https?://|wwwd{0,3}[.]|[a-z0-9.-]+[.][a-z]{2,4}/)(?:[^s()<>]+|(([^s()<>]+|(([^s()<>]+)))*))+(?:(([^s()<>]+|(([^s()<>]+)))*)|[^s`!()[]{};:'".,<>?«»“”‘’]))';

  return preg_replace_callback("#$pattern#i", function($matches) {
    $input = $matches[0];
    $url = preg_match('!^https?://!i', $input) ? $input : "http://$input";
    return '<a href="' . $url . '" rel="nofollow" target="_blank">' . "$input</a>";
  }, $str);
} 

Use:

$subject = 'this is a link http://google:ha.ckers.org maybe don't want to visit it?';
echo make_links($subject);

Output

this is a link <a href="http://google:ha.ckers.org" rel="nofollow" target="_blank">http://google:ha.ckers.org</a> maybe don't want to visit it?

answered Mar 7, 2020 at 4:35

<?php
preg_match_all('/(href|src)[s]?=[s"']?+(.*?)[s"']+.*?/', $webpage_content, $link_extracted);

preview

answered Apr 22, 2020 at 18:21

This Regex works great for me and i have checked with all types of URL,

<?php
$string = "Thisregexfindurlhttp://www.rubular.com/r/bFHobduQ3n mixedwithstring";
preg_match_all('/(https?|ssh|ftp)://[^s"]+/', $string, $url);
$all_url = $url[0]; // Returns Array Of all Found URL's
$one_url = $url[0][0]; // Gives the First URL in Array of URL's
?>

Checked with lots of URL’s can find here http://www.rubular.com/r/bFHobduQ3n

answered Sep 19, 2016 at 13:05

public function find_links($post_content){
    $reg_exUrl = "/(http|https|ftp|ftps)://[a-zA-Z0-9-.]+.[a-zA-Z]{2,3}(/S*)?/";
    // Check if there is a url in the text
    if(preg_match_all($reg_exUrl, $post_content, $urls)) {
        // make the urls hyper links,
        foreach($urls[0] as $url){
            $post_content = str_replace($url, '<a href="'.$url.'" rel="nofollow"> LINK </a>', $post_content);
        }
        //var_dump($post_content);die(); //uncomment to see result
        //return text with hyper links
        return $post_content;
    } else {
        // if no urls in the text just return the text
        return $post_content; 
    }
}

answered Aug 23, 2017 at 8:08

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Узнать подробнее

Профессия PHP-разработчик с нуля до PRO

Готовим PHP-разработчиков с нуля

Вы с нуля научитесь программировать сайты и веб-приложения на PHP, освоите фреймворк
Laravel, напишете облачное хранилище и поработаете над интернет-магазином в команде.
Сможете устроиться на позицию Junior-разработчика.

Узнать подробнее

I have this text:

$string = "this is my friend's website http://example.com I think it is coll";

How can I extract the link into another variable?

I know it should be by using regular expression especially preg_match() but I don’t know how?

If the text you extract the URLs from is user-submitted and you’re going to display the result as links anywhere, you have to be very, VERY careful to avoid XSS vulnerabilities, most prominently «javascript:» protocol URLs, but also malformed URLs that might trick your regexp and/or the displaying browser into executing them as Javascript URLs. At the very least, you should accept only URLs that start with «http», «https» or «ftp».

There’s also a blog entry by Jeff where he describes some other problems with extracting URLs.

You could do like this..

<?php
$string = "this is my friend's website http://example.com I think it is coll";
echo explode(' ',strstr($string,'http://'))[0]; //"prints" http://example.com

answered Dec 24, 2013 at 6:02

preg_match_all ("/a[s]+[^>]*?href[s]?=[s"']+".
                "(.*?)["']+.*?>"."([^<]+|.*?)?</a>/",
                $var, &$matches);

$matches = $matches[1];
$list = array();

foreach($matches as $var)
{    
    print($var."<br>");
}

answered Sep 1, 2011 at 12:54

You could try this to find the link and revise the link (add the href link).

$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://example.com";

if(preg_match($reg_exUrl, $text, $url)) {

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

} else {

       echo "No url in the text";

}

refer here: http://php.net/manual/en/function.preg-match.php

Here is a function I use, can’t remember where it came from but seems to do a pretty good job of finding links in the text. and making them links.

You can change the function to suit your needs. I just wanted to share this as I was looking around and remembered I had this in one of my helper libraries.

function make_links($str){

  $pattern = '(?xi)b((?:https?://|wwwd{0,3}[.]|[a-z0-9.-]+[.][a-z]{2,4}/)(?:[^s()<>]+|(([^s()<>]+|(([^s()<>]+)))*))+(?:(([^s()<>]+|(([^s()<>]+)))*)|[^s`!()[]{};:'".,<>?«»“”‘’]))';

  return preg_replace_callback("#$pattern#i", function($matches) {
    $input = $matches[0];
    $url = preg_match('!^https?://!i', $input) ? $input : "http://$input";
    return '<a href="' . $url . '" rel="nofollow" target="_blank">' . "$input</a>";
  }, $str);
} 

Use:

$subject = 'this is a link http://google:ha.ckers.org maybe don't want to visit it?';
echo make_links($subject);

Output

this is a link <a href="http://google:ha.ckers.org" rel="nofollow" target="_blank">http://google:ha.ckers.org</a> maybe don't want to visit it?

answered Mar 7, 2020 at 4:35

<?php
preg_match_all('/(href|src)[s]?=[s"']?+(.*?)[s"']+.*?/', $webpage_content, $link_extracted);

preview

answered Apr 22, 2020 at 18:21

This Regex works great for me and i have checked with all types of URL,

<?php
$string = "Thisregexfindurlhttp://www.rubular.com/r/bFHobduQ3n mixedwithstring";
preg_match_all('/(https?|ssh|ftp)://[^s"]+/', $string, $url);
$all_url = $url[0]; // Returns Array Of all Found URL's
$one_url = $url[0][0]; // Gives the First URL in Array of URL's
?>

Checked with lots of URL’s can find here http://www.rubular.com/r/bFHobduQ3n

answered Sep 19, 2016 at 13:05

public function find_links($post_content){
    $reg_exUrl = "/(http|https|ftp|ftps)://[a-zA-Z0-9-.]+.[a-zA-Z]{2,3}(/S*)?/";
    // Check if there is a url in the text
    if(preg_match_all($reg_exUrl, $post_content, $urls)) {
        // make the urls hyper links,
        foreach($urls[0] as $url){
            $post_content = str_replace($url, '<a href="'.$url.'" rel="nofollow"> LINK </a>', $post_content);
        }
        //var_dump($post_content);die(); //uncomment to see result
        //return text with hyper links
        return $post_content;
    } else {
        // if no urls in the text just return the text
        return $post_content; 
    }
}

answered Aug 23, 2017 at 8:08