Facebook Graph API Nested request syntax to array - php

Question

I'm trying to replicate Facebook's nested request syntax in PHP, converting the fields parameter into a multidimensional array.
/me?fields=name,updated_time,photos{name,source},likes{name,link},events.limit(4){name,start_time,end_time,photos}
Would result in something along the lines of...
Array
(
[name]
[updated_time]
[photos] => Array
(
[name]
[source]
)
[likes] => Array
(
[name]
[link]
)
)

Answer 1

Figured out how to match the graph API Using a loop. Decided it would be best to keep the filter, and limit modifiers as part of the object in order to keep the array as clean as possible
$a = $input;
$output = array();
$outputStacktrace = array(&$output);
$depth = 0;
$buffer = $key = '';
$m = memory_get_usage();
for ($i = 0; $i < strlen($a); $i++)
if ($a[$i] == ',') {
if (strlen($buffer))
if($depth == 0){
if(is_array($outputStacktrace[0]) && empty($outputStacktrace[0])){
$outputStacktrace[$depth][$buffer] = array();
}
} else {
$outputStacktrace[$depth][$key ? $key : count($outputStacktrace[$depth])] = $buffer;
}
$buffer = $key = '';
} elseif ($a[$i] == '{') {
$outputStacktrace[$depth][$buffer] = array();
$outputStacktrace[$depth + 1] = &$outputStacktrace[$depth][$buffer];
$depth++;
$buffer = '';
} elseif ($a[$i] == '}') {
if (strlen($buffer))
$outputStacktrace[$depth][$key ? $key : count($outputStacktrace[$depth])] = $buffer;
$buffer = $key = '';
unset($outputStacktrace[$depth]);
$depth--;
} else {
$buffer .= $a[$i];
}
if( $buffer!='' )
$outputStacktrace[$depth][$key ? $key : count($outputStacktrace[$depth])] = $buffer;
return ($output);