html - Save image from PHP URL - returns empty image -

i'm working on small project read data electronic identity cards.

it might worth mentioning i'm using lightopenid php library $attributes[''] data eid.

now i'm stuck trying save image displayed on http://my-url.com/photo.php

photo.php contains:

<?php session_start();  $photo = $_session['photo'];  header('content-type: image/jpeg');  echo($photo); 

the variable $photo contains $_session['photo'] comes index.php:

function base64url_decode($base64url) {     $base64 = strtr($base64url, '-_', '+/');     $plaintext = base64_decode($base64);     return ($plaintext); }  $encodedphoto = $attributes['eid/photo']; $photo = base64url_decode($encodedphoto); $_session['photo'] = $photo; 

the images both visible on index.php (<?php echo '<img src="photo.php"/>'; ?>) on photo.php.

i've read on few similar topics , tried following methods:

1. curl

$ch = curl_init();     curl_setopt($ch, curlopt_url, 'http://my-url.com/photo.php');      $fp = fopen('./photo/' . $filename . '.jpg', 'wb');       curl_setopt($ch, curlopt_file, $fp);       curl_setopt($ch, curlopt_header, 0);       curl_exec($ch); curl_close($ch);       fclose($fp); 

2. file_put_contents

 $input = "my-url.com/photo.php";  $output = './photo/' . $filename . '.jpg';  file_put_contents($output, file_get_contents($input)); 

1. copy

even tried basic copy:

copy( "http://my-url/photo.php", './photo/' . $filename . '.jpg'); 

all 3 methods create empty .jpg file in directory want them too.

let me know if need provide code. hope there's can point out mistakes

finally found solution.

i decode base64url once with:

function base64url_decodeonce($base64url){     $base64 = strtr($base64url, '-_', '+/');     return ($base64); } 

that way can use $base64 output for:

$data = 'data:image/jpeg;base64,' . $base64data .'\''; list($type, $data) = explode(';', $data); list(, $data)      = explode(',', $data); $data = base64_decode($data); file_put_contents('./photo/' . $filename . '.jpg', $data);