I've been searching around for this but all I could find was broken scripts and plus, I might have a method that is quite simple.
I'm trying to use a for () loop for this one.
This is what I've got:
<?php
$reg_exUrl = "/(http|https|ftp|ftps)\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?/";
$makerepstring = "Here is a link: http://youtube.com and another: http://google.com";
if(preg_match_all($reg_exUrl, $makerepstring, $url)) {
// make the url into link
for($i=0; $i < count(array_keys($url[0])); $i++){
$makerepstring = preg_replace($reg_exUrl, ''.$url[0][$i].' ', $makerepstring);
}
}
echo $makerepstring;
?>
However this fails brutally for some reason I can't comprehend.
The output from echo $makerepstring; as follows(from source code):
http://google.com " target="_blank" rel="nofollow">http://google.com </a> http://google.com " target="_blank" rel="nofollow">http://google.com </a>
I'd really like to do it with a for()... Could somebody try and figure out how to get this to work with me?
Thanks in advance!
/J
$reg_exUrl = "/(http|https|ftp|ftps)\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?/";
$makerepstring = "http://youtube.com http://google.com";
$url = array();
$instances = preg_match_all($reg_exUrl, $makerepstring, $url);
if ($instances > 0) {
// make the url into link
for($i=0; $i < count(array_keys($url[0])); $i++){
$makerepstring = preg_replace($reg_exUrl, ''.$url[0][$i].' ', $makerepstring);
/*echo $url[0][$i]."<br />";
echo $i."<br />";
print_r($url);
echo "<br />";*/
}
}
echo $makerepstring;
This does not work either, although I'm not quite sure how you meant I should do this.
EDIT:
$reg_exUrl = "/(http|https|ftp|ftps)\:\/\/[a-zA-Z0-9\-\.]+\.[a-zA-Z]{2,3}(\/\S*)?/";
$makeurl = "http://google.com http://youtube.com";
if(preg_match($reg_exUrl, $makeurl, $url)) {
echo preg_replace($reg_exUrl, ''.$url[0].' ', $makeurl);
} else {
echo $makeurl;
}
Would give:
http://google.com http://google.com
that's not how preg_match_all works. http://php.net/manual/en/function.preg-match-all.php shows you that the matches go in a passed-along array, and the function returns the number of matches, instead. So first call
...
$matches = array();
$instances = preg_match_all(..., $matches);
if ($instances > 0) {
// and then your code
}
...
And then iterate over the $matches array, which now has content.
You are performing the match twice:
in preg_match_all function
then you are matching again in preg_replace, which should not happen here
Use string concatation instead:
$makerepstring = "Here is a link: http://youtube.com and another: http://google.com";
$new_str = '';
if(preg_match_all($reg_exUrl, $makerepstring, $url)) {
var_dump($url[0]);
// make the url into link
for($i=0; $i < count(array_keys($url[0])); $i++){
$new_str .= ''.$url[0][$i].' ';
}
}
echo $new_str;
Related
I need to verify a text to show it in the page of a website. I need to transform all urls links of the the same website(not others urls of other websites) in links. I need to involve all them with the tag <a>. The problem is is the property href, that I need to put the correct url inside it. I am trying to verify all the the text and if I find a url, I need to verify if it contains the substring "http://". If not, I must put it in the href property. I did some attempt, but all their aren't working yet :( . Any idea how can I do this?
My function is below:
$string = "This is a url from my website: http://www.mysite.com.br and I have a article interesting there, the link is http://www.mysite.com.br/articles/what-is-psychology/205967. I need that the secure url link works too https://www.mysite.com.br/articles/what-is-psychology/205967. the following urls must be valid too: www.mysite.com.br and mysite.com.br";
function urlMySite($string){
$verifyUrl = '';
$urls = array("mysite.com.br");
$text = explode(" ", $string);
$alltext = "";
for($i = 0; $i < count($texto); $i++){
foreach ($urls as $value){
$pos = strpos($text[$i], $value);
if (!($pos === false)){
$verifyUrl = " <a href='".$text[$i]."' target='_blank'>".$text[$i]."</a> ";
if (strpos($verifyUrl, 'http://') !== true) {
$verifyUrl = " <a href='http://".$text[$i]."' target='_blank'>".$text[$i]."</a> ";
}
$alltext .= $verifyUrl;
} else {
$alltext .= " ".$text[$i]." ";
}
}
}
return $alltext;
}
You should use PREG_MATCH_ALL to find all occurances of the URL and replace each of the Matches with a clickable Link.
You could use this function:
function augmentText($text){
$pattern = "~(https?|file|ftp)://[a-z0-9./&?:=%-_]*~i";
preg_match_all($pattern, $text, $matches);
if( count($matches[0]) > 0 ){
foreach($matches[0] as $match){
$text = str_replace($match, "<a href='" . $match . "' target='_blank'>" . $match . "</a>", $text);
}
}
return $text;
}
Change the reguylar expression pattern to match only the URL's you want to make clickable.
Good luck
I have a markdown text content which I have to replace without using library functions.So I used preg replace for this.It works fine for some cases.For cases like heading
for eg Heading
=======
should be converted to <h1>Heading</h1> and also
##Sub heading should be converted to <h2>Sub heading</h2>
###Sub heading should be converted to <h3>Sub heading</h3>
I have tried
$text = preg_replace('/##(.+?)\n/s', '<h2>$1</h2>', $text);
The above code works but I need to have count of hash symbol and based on that I have to assign heading tags.
Anyone help me please....
Try using preg_replace_callback.
Something like this -
$regex = '/(#+)(.+?)\n/s';
$line = "##Sub heading\n ###sub-sub heading\n";
$line = preg_replace_callback(
$regex,
function($matches){
$h_num = strlen($matches[1]);
return "<h$h_num>".$matches[2]."</h$h_num>";
},
$line
);
echo $line;
The output would be something like this -
<h2>Sub heading</h2> <h3>sub-sub heading</h3>
EDIT
For the combined problem of using = for headings and # for sub-headings, the regex gets a bit more complicated, but the principle remains the same using preg_replace_callback.
Try this -
$regex = '/(?:(#+)(.+?)\n)|(?:(.+?)\n\s*=+\s*\n)/';
$line = "Heading\n=======\n##Sub heading\n ###sub-sub heading\n";
$line = preg_replace_callback(
$regex,
function($matches){
//var_dump($matches);
if($matches[1] == ""){
return "<h1>".$matches[3]."</h1>";
}else{
$h_num = strlen($matches[1]);
return "<h$h_num>".$matches[2]."</h$h_num>";
}
},
$line
);
echo $line;
Whose Output is -
<h1>Heading</h1><h2>Sub heading</h2> <h3>sub-sub heading</h3>
Do a preg_match_all like this:
$string = "#####asdsadsad";
preg_match_all("/^#/", $string, $matches);
var_dump ($matches);
And based on count of matches you can do whatever you want.
Or, use the preg_replace_callback function.
$input = "#This is my text";
$pattern = '/^(#+)(.+)/';
$mytext = preg_replace_callback($pattern, 'parseHashes', $input);
var_dump($mytext);
function parseHashes($input) {
var_dump($input);
$matches = array();
preg_match_all('/(#)/', $input[1], $matches);
var_dump($matches[0]);
var_dump(count($matches[0]));
$cnt = count($matches[0]);
if ($cnt <= 6 && $cnt > 0) {
return '<h' . $cnt . ' class="if you want class here">' . $input[2] . '</h' . $cnt . '>';
} else {
//This is not a valid h tag. Do whatever you want.
return false;
}
}
I need some help with twitter hashtag, I need to extract a certain hashtag as string variable in PHP.
Until now I have this
$hash = preg_replace ("/#(\\w+)/", "#$1", $tweet_text);
but this just transforms hashtag_string into link
Use preg_match() to identify the hash and capture it to a variable, like so:
$string = 'Tweet #hashtag';
preg_match("/#(\\w+)/", $string, $matches);
$hash = $matches[1];
var_dump( $hash); // Outputs 'hashtag'
Demo
I think this function will help you:
echo get_hashtags($string);
function get_hashtags($string, $str = 1) {
preg_match_all('/#(\w+)/',$string,$matches);
$i = 0;
if ($str) {
foreach ($matches[1] as $match) {
$count = count($matches[1]);
$keywords .= "$match";
$i++;
if ($count > $i) $keywords .= ", ";
}
} else {
foreach ($matches[1] as $match) {
$keyword[] = $match;
}
$keywords = $keyword;
}
return $keywords;
}
As i understand you are saying that
in text/pargraph/post you want to show tag with hash sign(#) like this:- #tag
and in url you want to remove # sign because the string after # is not sended to server in request so i have edited your code and try out this:-
$string="www.funnenjoy.com is best #SocialNetworking #website";
$text=preg_replace('/#(\\w+)/','<a href=/hash/$1>$0</a>',$string);
echo $text; // output will be www.funnenjoy.com is best <a href=search/SocialNetworking>#SocialNetworking</a> <a href=/search/website>#website</a>
Extract multiple hashtag to array
$body = 'My #name is #Eminem, I am rap #god, #Yoyoya check it #out';
$hashtag_set = [];
$array = explode('#', $body);
foreach ($array as $key => $row) {
$hashtag = [];
if (!empty($row)) {
$hashtag = explode(' ', $row);
$hashtag_set[] = '#' . $hashtag[0];
}
}
print_r($hashtag_set);
You can use preg_match_all() PHP function
preg_match_all('/(?<!\w)#\w+/', $description, $allMatches);
will give you only hastag array
preg_match_all('/#(\w+)/', $description, $allMatches);
will give you hastag and without hastag array
print_r($allMatches)
You can extract a value in a string with preg_match function
preg_match("/#(\w+)/", $tweet_text, $matches);
$hash = $matches[1];
preg_match will store matching results in an array. You should take a look at the doc to see how to play with it.
Here's a non Regex way to do it:
<?php
$tweet = "Foo bar #hashTag hello world";
$hashPos = strpos($tweet,'#');
$hashTag = '';
while ($tweet[$hashPos] !== ' ') {
$hashTag .= $tweet[$hashPos++];
}
echo $hashTag;
Demo
Note: This will only pickup the first hashtag in the tweet.
I am using the following code to add links to urls in text...
if (preg_match_all("#((http(s?)://)|www\.)?([a-zA-Z0-9\-\.])(\w+[^\s\)\<]+)#i", $str, $matches))
{
?><pre><?php
print_r($matches);
?></pre><?php
for ($i = 0; $i < count($matches[0]); $i++)
{
$url = $matches[0][$i];
$parsed = parse_url($url);
$prefix = '';
if (!isset($parsed["scheme"])){
$prefix = 'http://';
}
$url = $prefix.$url;
$replace = ''.$matches[0][$i].'';
$str = str_replace($matches[0][$i], ''.$matches[0][$i].'', $str);
}
}
the problem comes when i enter twice the same url in the text at any place..
for example.
google.com text text google.com
it will add a link on the first one and then search for google.com which is inside the link and try to add again in there..
how can i make sure it will add the links separately without problems?
You can use preg_replace_callback() to reliably work on individual matches.
Im working on a commenting web application and i want to parse user mentions (#user) as links. Here is what I have so far:
$text = "#user is not #user1 but #user3 is #user4";
$pattern = "/\#(\w+)/";
preg_match_all($pattern,$text,$matches);
if($matches){
$sql = "SELECT *
FROM users
WHERE username IN ('" .implode("','",$matches[1]). "')
ORDER BY LENGTH(username) DESC";
$users = $this->getQuery($sql);
foreach($users as $i=>$u){
$text = str_replace("#{$u['username']}",
"<a href='#' class='ct-userLink' rel='{$u['user_id']}'>#{$u['username']}</a> ", $text);
}
$echo $text;
}
The problem is that user links are being overlapped:
<a rel="11327" class="ct-userLink" href="#">
<a rel="21327" class="ct-userLink" href="#">#user</a>1
</a>
How can I avoid links overlapping?
Answer Update
Thanks to the answer picked, this is how my new foreach loop looks like:
foreach($users as $i=>$u){
$text = preg_replace("/#".$u['username']."\b/",
"<a href='#' title='{$u['user_id']}'>#{$u['username']}</a> ", $text);
}
Problem seems to be that some usernames can encompass other usernames. So you replace user1 properly with <a>user1</a>. Then, user matches and replaces with <a><a>user</a>1</a>. My suggestion is to change your string replace to a regex with a word boundary, \b, that is required after the username.
The Twitter widget has JavaScript code to do this. I ported it to PHP in my WordPress plugin. Here's the relevant part:
function format_tweet($tweet) {
// add #reply links
$tweet_text = preg_replace("/\B[#＠]([a-zA-Z0-9_]{1,20})/",
"#<a class='atreply' href='http://twitter.com/$1'>$1</a>",
$tweet);
// make other links clickable
$matches = array();
$link_info = preg_match_all("/\b(((https*\:\/\/)|www\.)[^\"\']+?)(([!?,.\)]+)?(\s|$))/",
$tweet_text, $matches, PREG_SET_ORDER);
if ($link_info) {
foreach ($matches as $match) {
$http = preg_match("/w/", $match[2]) ? 'http://' : '';
$tweet_text = str_replace($match[0],
"<a href='" . $http . $match[1] . "'>" . $match[1] . "</a>" . $match[4],
$tweet_text);
}
}
return $tweet_text;
}
instead of parsing for '#user' parse for '#user ' (with space in the end) or ' #user ' to even avoid wrong parsing of email addresses (eg: mailaddress#user.com) maybe ' #user: ' should also be allowed. this will only work, if usernames have no whitespaces...
You can go for a custom str replace function which stops at first replace.. Something like ...
function str_replace_once($needle , $replace , $haystack){
$pos = strpos($haystack, $needle);
if ($pos === false) {
// Nothing found
return $haystack;
}
return substr_replace($haystack, $replace, $pos, strlen($needle));
}
And use it like:
foreach($users as $i=>$u){
$text = str_replace_once("#{$u['username']}",
"<a href='#' class='ct-userLink' rel='{$u['user_id']}'>#{$u['username']}</a> ", $text);
}
You shouldn’t replace one certain user mention at a time but all at once. You could use preg_split to do that:
// split text at mention while retaining user name
$parts = preg_split("/#(\w+)/", $text, -1, PREG_SPLIT_DELIM_CAPTURE);
$n = count($parts);
// $n is always an odd number; 1 means no match found
if ($n > 1) {
// collect user names
$users = array();
for ($i=1; $i<$n; $i+=2) {
$users[$parts[$i]] = '';
}
// get corresponding user information
$sql = "SELECT *
FROM users
WHERE username IN ('" .implode("','", array_keys($users)). "')";
$users = array();
foreach ($this->getQuery($sql) as $user) {
$users[$user['username']] = $user;
}
// replace mentions
for ($i=1; $i<$n; $i+=2) {
$u = $users[$parts[$i]];
$parts[$i] = "<a href='#' class='ct-userLink' rel='{$u['user_id']}'>#{$u['username']}</a>";
}
// put everything back together
$text = implode('', $parts);
}
I like dnl solution of parsing ' #user', but maybe is not suitable for you.
Anyway, did you try to use strip_tags function to remove the anchor tags? That way you have the string without the links, and you can parse it building the links again.
strip_tags