Wednesday, 27 December 2017

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);

?>

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