Facebook api , Recursive Function and 500 error - php

Question

this is my first project using facebook api and facebook PHP sdk , basically i'm trying to get all user statuses. I wrote a script that should work , but i got an 500 error (even if i changed max execution times or set time limit (0)), but only when i use a recursive function inside, take a look to the code :
$request = new FacebookRequest(
$session,
'GET',
'/me/statuses'
);
$response = $request->execute();
$graphObject = $response->getGraphObject();
$x = $graphObject->getProperty('data');
$y = $x->asArray(); //now i got an array
$paging = $graphObject->getProperty('paging'); // i pick paging with "next" and "prevoiuos "
$paged = $paging->asArray(); //as array
$counter = 0 ;
foreach ($y as $el){
echo ('<h3>'.$y[$counter]->message.'</h3>');
echo "<br/>";
echo "<br/>";
$counter++;
}
$next = $paged['next']; // now i got url for load 20 more statuses
$response = file_get_contents($next); // get content of url
//recoursive function every time i use looper with content of next
function looper($response){
$array = json_decode($response, true);
$secondarray = ($array['data']);
$paging = ($array['paging']); // again i pick url for load next statuses
$next = $paging['next'];// again i pick url for load next statuses
$nextResponse = file_get_contents($next);// again i pick url for load next statuses and i will use this.
$counter2 = 0 ;
foreach ($secondarray as $el){ // put on page next 20 statuses
echo ('<h3>'. $secondarray[$counter2]['message'] .'</h3>');
echo "<br/>";
echo "<br/>";
$counter2++;
}
if ( is_null($nextResponse) == false ){ // if in next call i got 20 more statuses(not empty) call again this function
looper($nextResponse);
} else { echo "last message" ; die();} //else stop.
}
looper($response);
}
If i dont recall the function (basically i comment out the if statement) script works fine and prints 20+20 statuses , else it give me 500 internal error.
As i said i tried changin max execution time or set_time_limit(0), but nothing happens.
I'm not sure if problem is my hosting (godaddy) , or if my script is not good / not efficent. any help?
Thanks Nico

Answer 1

I think I found your issue. You are asigning $nextResponse the value returned by file_get_contents. See http://php.net/manual/es/function.file-get-contents.php it returns false in case of content couldnt be retrieved. Try checking for false instead of null:
..........
if ( false != $nextResponse ){ // if in next call i got 20 more statuses(not empty) call again this function
looper($nextResponse);
} else { echo "last message" ; die();} //else stop.