I'm trying to get a YouTube video thumbnail with this
echo '<img src="http://i1.ytimg.com/vi/' . $video_id = $video_id[1]. '/maxresdefault.jpg" alt="' . $video_title . '" />';
but that returns:
http://i1.ytimg.com/vi/zbZu8cOTh_4&feature=youtube_gdata_player/maxresdefault.jpg
but I want it to return:
http://i1.ytimg.com/vi/zbZu8cOTh_4/maxresdefault.jpg
So I have to find a way to remove
"&feature=youtube_gdata_player"
from the url.
How do I do that?
I've tried
$video_id = str_replace('&feature=youtube_gdata_player', '', $video_id)
but I can't get that to work.
(I'm new to PHP, so I probably made some stupid error.)
You can do it with a regex :
$string = "zbZu8cOTh_4&feature=youtube_gdata_player";
$pattern = '/(&[\w\W]+$)/i';
$replacement = '';
preg_replace($pattern, $replacement, $string);
or with strpos :
$string = "zbZu8cOTh_4&feature=youtube_gdata_player";
$p = strrpos($string, "&");
substr($string,0, $p);
Related
Using the following code:
$text = "أطلقت غوغل النسخة المخصصة للأجهزة الذكية العاملة بنظام أندرويد من الإصدار “25″ لمتصفحها الشهير كروم.ولم تحدث غوغل تطبيق كروم للأجهزة العاملة بأندرويد منذ شهر تشرين الثاني العام الماضي، وهو المتصفح الذي يستخدمه نسبة 2.02% من أصحاب الأجهزة الذكية حسب دراسة سابقة. ";
$tags = "غوغل, غوغل النسخة, كروم";
$tags = explode(",", $tags);
foreach($tags as $k=>$v) {
$text = preg_replace("/\b{$v}\b/u","$0",$text, 1);
}
echo $text;
Will give the following result:
I love PHP">love PHP</a>, but I am facing a problem
Note that my text is in Arabic.
The way is to do all in one pass. The idea is to build a pattern with an alternation of tags. To make this way work, you must before sort the tags because the regex engine will stop at the first alternative that succeeds (otherwise 'love' will always match even if it is followed by 'php' and 'love php' will never be matched).
To limit the replacement to the first occurence of each word you can remove tag from the array once it has been found and you test if it is always present in the array inside the replacement callback function:
$text = 'I love PHP, I love love but I am facing a problem';
$tagsCSV = 'love, love php, facing';
$tags = explode(', ', $tagsCSV);
rsort($tags);
$tags = array_map('preg_quote', $tags);
$pattern = '/\b(?:' . implode('|', $tags) . ')\b/iu';
$text = preg_replace_callback($pattern, function ($m) use (&$tags) {
$mLC = mb_strtolower($m[0], 'UTF-8');
if (false === $key = array_search($mLC, $tags))
return $m[0];
unset($tags[$key]);
return '<a href="index.php?s=news&tag=' . rawurlencode($mLC)
. '">' . $m[0] . '</a>';
}, $text);
Note: when you build an url you must encode special characters, this is the reason why I use preg_replace_callback instead of preg_replace to be able to use rawurlencode.
If you have to deal with an utf8 encoded string, you need to add the u modifier to the pattern and you need to replace strtolower with mb_strtolower)
the preg_split way
$tags = explode(', ', $tagsCSV);
rsort($tags);
$tags = array_map('preg_quote', $tags);
$pattern = '/\b(' . implode('|', $tags) . ')\b/iu';
$items = preg_split($pattern, $text, -1, PREG_SPLIT_DELIM_CAPTURE);
$itemsLength = count($items);
$i = 1;
while ($i<$itemsLength && count($tags)) {
if (false !== $key = array_search(mb_strtolower($items[$i], 'UTF-8'), $tags)) {
$items[$i] = '<a href="index.php?s=news&tag=' . rawurlencode($tags[$key])
. '">' . $items[$i] . '</a>';
unset($tags[$key]);
}
$i+=2;
}
$result = implode('', $items);
Instead of calling preg_replace multiple times, call it a single time with a regexp that matches any of the tags:
$tags = explode(",", tags);
$tags_re = '/\b(' . implode('|', $tags) . ')\b/u';
$text = preg_replace($tags_re, '$0', $text, 1);
This turns the list of tags into the regexp /\b(love|love php|facing)\b/u. x|y in a regexp means to match either x or y.
how to replace <p>hello</p> <p>world</p> to hello<br />world <br />
I've tried searching on stack but there is no matched result.
You could do this by using str_replace() function.
For instance:
$string = "<p>hello</p> <p>world</p>";
$string = str_replace('<p>', '', $string);
$string = str_replace('</p>', '<br />' , $string);
I try this myself and get what I expected
$pattern = '/<p>(\w+)\<\/p>/';
$subject = '<p>hello</p><p>world</p>';
$replacement = '${1}<br/>';
$out = preg_replace($pattern, $replacement, $subject);
I just wonder which is better regex or str_replace
I wrote a better solution, hope everybody can see it helpful and maybe improve it
$pattern = '/<p(.*?)>((.*?)+)\<\/p>/';
$replacement = '${2}<br/>';
$subject = 'html string';
$out = preg_replace($pattern, $replacement, $subject);
Use this to prevent breaking the first and last <p></p> :
$string = str_replace($string, '</p><p>', '');
But if a space comes between the tags, it won't work.
<?php
$str = '<p>hello</p> <p>world</p>';
$replaceArr = array('<p>', '</p>', '</p> <p>');
$replacementArr = array('', '', '<br />');
$str = str_replace($replaceArr, $replacementArr, $str);
echo $str;
?>
Try above code.
I currently have a code that finds and replaces urls into complete html links. It works fine but now i need to update it so that if there is image url then it should convert it into a html img tag and display it. Function im using now is...
function auto_link_text($text) {
$pattern = '#\b(([\w-]+://?|www[.])[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|/)))#';
$callback = create_function('$matches', '
$url = array_shift($matches);
$url_parts = parse_url($url);
return sprintf(\'<a rel="nowfollow" target="_blank" href="%s">%s</a>\', $url, $url);
');
return preg_replace_callback($pattern, $callback, $text);
}
Got it from...
How to add anchor tag to a URL from text input
Here is an example of the text i would to it to go through...
asdf
http://google.com/
asfd
http://yahoo.com/logo.jpg
http://www.apple.com/sdfsd.php?page_id=13&id=18210&status=active#1
http://youtube.com/logo.png
like it updated function to output...
asdf
<a rel="nowfollow" target="_blank" href="http://google.com/">http://google.com/</a>
asfd
<img src="http://yahoo.com/logo.jpg" class="example">
<a rel="nowfollow" target="_blank" href="http://www.apple.com/sdfsd.php?page_id=13&id=18210&status=active#1">http://www.apple.com/sdfsd.php?page_id=13&id=18210&status=active#1</a>
<img src="http://youtube.com/logo.png" class="example">
Big thanks in advance!
You can use this for example:
function create_anchor_tag($url, $text = false) {
if ($text===false) $text = $url;
return '<a rel="no-follow" target="_blank" href="' . $url . '">'
. $text . '</a>';
}
function create_image_tag($url) {
return '<img src="' . $url . '"/>';
}
function auto_link_text($text) {
$pattern = '~\b(?:(?:ht|f)tps?://|www\.)\S+(?<=[\PP?])~i';
$callback = function ($m) {
$img_ext = array('jpg', 'jpeg', 'gif', 'png');
$path = parse_url($m[0], PHP_URL_PATH);
$ext = substr(strrchr($path, '.'), 1);
if (in_array(strtolower($ext), $img_ext))
return create_image_tag($m[0]);
return create_anchor_tag($m[0]);
};
return preg_replace_callback($pattern, $callback, $text);
}
I used several functions to make it more clea[rn], but you can easily adapt it as you like.
Here is the nice post about the best suitable regex pattern for valid URL. I picked one from there to group all the URLs.
Online demo
Steps to follow:
simply extract the url.
put a check on the url and based on your own logic substitute the tag as shown in demo.
sample code: (get all the valid urls in groups. get it from index 1)
$re = "/(([A-Za-z]{3,9}:(?:\\/\\/)?(?:[-;:&=\\+\\$,\\w]+#)?[A-Za-z0-9.-]+|(?:www.|[-;:&=\\+\\$,\\w]+#)[A-Za-z0-9.-]+)((?:\\/[\\+~%\\/.\\w-_]*)?\\??(?:[-\\+=&;%#.\\w_]*)#?(?:[\\w]*))?)/";
$str = "...";
preg_match_all($re, $str, $matches);
sample code: (substitute anchor tag (or what ever you want to add))
$re = "/(([A-Za-z]{3,9}:(?:\\/\\/)?(?:[-;:&=\\+\\$,\\w]+#)?[A-Za-z0-9.-]+|(?:www.|[-;:&=\\+\\$,\\w]+#)[A-Za-z0-9.-]+)((?:\\/[\\+~%\\/.\\w-_]*)?\\??(?:[-\\+=&;%#.\\w_]*)#?(?:[\\w]*))?)/";
$str = "...";
$subst = '$1';
$result = preg_replace($re, $subst, $str);
Hello I'm trying to convert youtube links into embed code.
this is what I have:
<?php
$text = $post->text;
$search = '#<a(.*?)(?:href="https?://)?(?:www\.)?(?:youtu\.be/|youtube\.com(?:/embed/|/v/|/watch?.*?v=))([\w\-]{10,12}).*$#x';
$replace = '<center><iframe width="560" height="315" src="http://www.youtube.com/embed/$2" frameborder="0" allowfullscreen></iframe></center>';
$text = preg_replace($search, $replace, $text);
echo $text;
?>
It works for one link. However if I add two, it will only swap the last occurrence. What do I have to change?
You're not handling the end of the string properly. Remove the $, and replace it with the closing tag </a>. this will fix it.
$search = '#<a(.*?)(?:href="https?://)?(?:www\.)?(?:youtu\.be/|youtube\.com(?:/embed/|/v/|/watch?.*?v=))([\w\-]{10,12}).*<\/a>#x';
$replace = '<center><iframe width="560" height="315" src="http://www.youtube.com/embed/$2" frameborder="0" allowfullscreen></iframe></center>';
$text = preg_replace($search, $replace, $text);
Try this : preg_replace($search, $replace, $text, -1);
I know it's the default but who knows...
EDIT Try that if not working ;
do{
$text = preg_replace($search, $replace, $text, -1, $Count);
}
while($Count);
Here are a regular expresion more efficient: http://pregcopy.com/exp/26, tralate this to PHP: (add "s" modifier)
<?php
$text = $post->text;
$search = '#<a (?:.*?)href=["\\\']http[s]?:\/\/(?:[^\.]+\.)*youtube\.com\/(?:v\/|watch\?(?:.*?\&)?v=|embed\/)([\w\-\_]+)["\\\']#ixs';
$replace = '<center><iframe width="560" height="315" src="http://www.youtube.com/embed/$1" frameborder="0" allowfullscreen></iframe></center>';
$text = preg_replace($search, $replace, $text);
echo $text;
?>
Test it
There are two types of youtube link for one video:
Example:
$link1 = 'https://www.youtube.com/watch?v=NVcpJZJ60Ao';
$link2 = 'https://www.youtu.be/NVcpJZJ60Ao';
This function handles both:
function getYoutubeEmbedUrl($url)
{
$shortUrlRegex = '/youtu.be\/([a-zA-Z0-9_-]+)\??/i';
$longUrlRegex = '/youtube.com\/((?:embed)|(?:watch))((?:\?v\=)|(?:\/))([a-zA-Z0-9_-]+)/i';
if (preg_match($longUrlRegex, $url, $matches)) {
$youtube_id = $matches[count($matches) - 1];
}
if (preg_match($shortUrlRegex, $url, $matches)) {
$youtube_id = $matches[count($matches) - 1];
}
return 'https://www.youtube.com/embed/' . $youtube_id ;
}
The output of $link1 or $link2 would be the same :
$output1 = getYoutubeEmbedUrl($link1);
$output2 = getYoutubeEmbedUrl($link2);
// output for both: https://www.youtube.com/embed/NVcpJZJ60Ao
Now you can use the output in iframe!
I have the following, simple code:
$text = str_replace($f,''.$u.'',$text);
where $f is a URL, like http://google.ca, and $u is the name of the URL (my function names it 'Google').
My problem is, is if I give my function a string like
http://google.ca http://google.ca
it returns
Google" target="_blank">Google</a> Google" target="_blank">Google</a>
Which obviously isn't what I want. I want my function to echo out two separate, clickable links. But str_replace is replacing the first occurrence (it's in a loop to loop through all the found URLs), and that first occurrence has already been replaced.
How can I tell str_replace to ignore that specific one, and move onto the next? The string given is user input, so I can't just give it a static offset or anything with substr, which I have tried.
Thank you!
One way, though it's a bit of a kludge: you can use a temporary marker that (hopefully) won't appear in the string:
$text = str_replace ($f, '' . $u . '',
$text);
That way, the first substitution won't be found again. Then at the end (after you've processed the entire line), simply change the markers back:
$text = str_replace ('XYZZYPLUGH', $f, $text);
Why not pass your function an array of URLs, instead?
function makeLinks(array $urls) {
$links = array();
foreach ($urls as $url) {
list($desc, $href) = $url;
// If $href is based on user input, watch out for "javascript: foo;" and other XSS attacks here.
$links[] = '<a href="' . htmlentities($href) . '" target="_blank">'
. htmlentities($desc)
. '</a>';
}
return $links; // or implode('', $links) if you want a string instead
}
$urls = array(
array('Google', 'http://google.ca'),
array('Google', 'http://google.ca')
);
var_dump(makeLinks($urls));
If i understand your problem correctly, you can just use the function sprintf. I think something like this should work:
function urlize($name, $url)
{
// Make sure the url is formatted ok
if (!filter_var($url, FILTER_VALIDATE_URL))
return '';
$name = htmlspecialchars($name, ENT_QUOTES);
$url = htmlspecialchars($url, ENT_QUOTES);
return sprintf('%s', $url, $name);
}
echo urlize('my name', 'http://www.domain.com');
// my name
I havent test it though.
I suggest you to use preg_replace instead of str_replace here like this code:
$f = 'http://google.ca';
$u = 'Google';
$text='http://google.ca http://google.ca';
$regex = '~(?<!<a href=")' . preg_quote($f) . '~'; // negative lookbehind
$text = preg_replace($regex, ''.$u.'', $text);
echo $text . "\n";
$text = preg_replace($regex, ''.$u.'', $text);
echo $text . "\n";
OUTPUT:
Google Google
Google Google