Warning: file_get_contents(): Filename cannot be empty

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Hi every one,

Im getting error while using  file_get_contents(): function.

(Warning: file_get_contents(): Filename cannot be empty)

Im using file_get_contents(): function to get urls links from ($convert)
variable.  

Here is my code

<?php


error_reporting(E_ALL);
ini_set("display_errors", 1);




$url = "http://www.sahafah.net/rss.php";;


$rss = file_get_contents($url);

ini_set('mbstring.substitute_character', "none");
$rss1= mb_convert_encoding($rss, 'UTF-8', 'UTF-8');
$rss3 = simplexml_load_string($rss1);
if($rss3)
{
$items = $rss3->channel->item;
foreach($items as $item)
{

$title = $item->title;
$link = $item->link;
$published_on = $item->pubDate;
$description = $item->description;
$category = $item->category;
$guid = $item->guid;




$string2 = $item->description;
preg_match('/http.*.jpg/',$string2,$match2);
$convert = implode(",", $match2);



// A few settings

// Read image path, convert to base64 encoding
$imageData = base64_encode(file_get_contents($convert));

// Format the image SRC:  data:{mime};base64,{data};
$src = 'data: '.exif_imagetype($convert).';base64,'.$imageData;

// Echo out a sample image
echo '<img src="', $src, '">';









}


}







?>  


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