link preview like facebook using php

link preview like facebook using php

Hello here example with text area 

<?php

$string =  "adasd asdad asdasd https://www.facebook.com asdasd asdasdsa ";

$preview_data = array();

$preview_data['title'] = "";

$preview_data['desc'] = "";

$preview_data['url'] = "";

$preview_data['image'] = "";

$myurl = "";

if($string!=''){

$string_array = explode(" ",$string);

if(count($string_array) > 0){

foreach($string_array as $string_value){

if (filter_var($string_value, FILTER_VALIDATE_URL)) {

$myurl = $string_value;

break;

} // if of url

if($string_value!=''){

$sub_string_check = explode(".",$string_value);

if(count($sub_string_check) >= 2){

$myurl = "http://" .$string_value;

break;

}

}

} // foreach for loop

 

} // if for array count

}// main if condition

if (filter_var($myurl, FILTER_VALIDATE_URL)) {

$agent = "'Mozilla/5.0 (Windows NT 6.2; WOW64; rv:17.0) Gecko/20100101 Firefox/17.0';";

$ch = curl_init();

    curl_setopt($ch, CURLOPT_HEADER, 0);

    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

curl_setopt($ch, CURLOPT_FAILONERROR, true);

    curl_setopt($ch, CURLOPT_URL, $myurl);

    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);

curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);

//curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);

curl_setopt($ch, CURLOPT_USERAGENT, $agent);

    

    $data = curl_exec($ch);

    curl_close($ch);

$dom = new DOMDocument();

@$dom->loadHTML($data);

//$page = new self();

    

    // Parse DOM to get Title

    $nodes = $dom->getElementsByTagName('title');

    $title = $nodes->item(0)->nodeValue;

    

    // Parse DOM to get Meta Description

    $metas = $dom->getElementsByTagName('meta');

    $body = "";

    for ($i = 0; $i < $metas->length; $i++) {

        $meta = $metas->item($i);

$name = $meta->getAttribute('property');

$name123 = $meta->getAttribute('name');

        //if ($meta->getAttribute('name') == 'description') {

             $body[$name] = $meta->getAttribute('content');

$body[$name123] = $meta->getAttribute('content');

        //}

    }

    

    // Parse DOM to get Images

    $image_urls = array();

$image_src = array();

    $images = $dom->getElementsByTagName('img');

     

     for ($i = 0; $i < $images->length; $i ++) {

         $image = $images->item($i);

         $src = $image->getAttribute('src');

         

         if(filter_var($src, FILTER_VALIDATE_URL)) {

             $image_src[] = $src;

         }

     }

    

    $output = array(

        'title' => $title,

        'image_src' => $image_src,

        'body' => $body

    );

echo "<pre>";

print_r($output);

$title = "";

$description ="";

$url = "";

$image_url = "";

if(isset($output['title'])){

$title = $output['title'];

}elseif(isset($output['body']['og:title'])){

$title = $output['body']['og:title'];

}elseif(isset($output['body']['twitter:title'])){

$title = $output['body']['twitter:title'];

}

if(isset($output['body']['description'])){

$description = $output['body']['description'];

}elseif(isset($output['body']['og:description'])){

$description = $output['body']['og:description'];

}elseif(isset($output['body']['twitter:description'])){

$description = $output['body']['twitter:description'];

}

if(isset($output['body']['url'])){

$url = $output['url'];

}elseif(isset($output['body']['og:url'])){

$url = $output['body']['og:url'];

}elseif(isset($output['body']['twitter:url'])){

$url = $output['body']['twitter:url'];

}elseif(isset($output['body']['al:web:url'])){

$url = $output['body']['al:web:url'];

}else{

$url =$myurl;

}

if(isset($output['body']['image'])){

$image_url = $output['image'];

}elseif(isset($output['body']['og:image'])){

$image_url = $output['body']['og:image'];

}elseif(isset($output['body']['twitter:image'])){

$image_url = $output['body']['twitter:image'];

}elseif(isset($output['image_src'][0])){

$image_url = $output['image_src'][0];

}

$preview_data['title'] = $title;

$preview_data['desc'] = $description;

$preview_data['url'] = $url;

if($image_url!=""){

$preview_data['image'] = filter_var($image_url, FILTER_VALIDATE_URL)?$image_url:$url.$image_url;

}

 

 

/*if(!filter_var($image_url, FILTER_VALIDATE_URL)) {

             

foreach($output['body'] as $t){

$preview_data['image'] = $url.$t;

}

 

         }*/

}

echo "<pre>";

print_r($preview_data);

?>