get meta description , title and image from url like facebook link sharing - php

Question

my code is
function getTitle($Url){
$str = file_get_contents($Url);
if(strlen($str)>0){
preg_match("/\<title\>(.*)\<\/title\>/",$str,$title);
return $title[1];
}
else
{
return false;
}
}
function getMetas($Url){
$str = file_get_contents($Url);
if(strlen($str)>0){
// preg_match("/\<title\>(.*)\<\/title\>/",$str,$title);
preg_match("/<meta name=\"description\" content=\"(.*?)\"/",$str,$title);
// preg_match( '<meta name="description".*content="([^"]+)">siU', $str, $title);
return $title[1];
}
else
{
return false;
}
}
//Example:
$url=$_POST['url'];
echo getTitle($url);
echo "<br><br>";
echo getMetas($url);
this does not shows result for all the url's , example http://google.com

Answer 1

Why are you using regular expression for parsing the <meta> tags ?
PHP has an in-built function for parsing the meta information , it is called the get_meta_tags()
Illustration :
<?php
$tags = get_meta_tags('http://www.stackoverflow.com/');
echo "<pre>";
print_r($tags);
OUTPUT:
Array
(
[twitter:card] => summary
[twitter:domain] => stackoverflow.com
[og:type] => website
[og:image] => http://cdn.sstatic.net/stackoverflow/img/apple-touch-icon#2.png?v=fde65a5a78c6
[og:title] => Stack Overflow
[og:description] => Q&A for professional and enthusiast programmers
[og:url] => http://stackoverflow.com/
)
As you can see the title , image and description are being parsed which you really want.

Answer 2

I know the question is 1.5 years old. But if you are still looking for it, you can use https://urlmeta.org. Its a free API to extract URL meta.

Answer 3

You can check a URL for http or https by
$url='stackoverflow.com';
$http_check='http://';
$https_check='https://';
if(substr($url,0,7)!=$http_check){
$url=$http_check.$url;
}else if(substr($url,0,8)!=$https_check){
$url=$https_check.$url;
}else{
$url=$url
}
then you can use the above answer
<?php
$tags = get_meta_tags($url);
echo "<pre>";
print_r($tags);