https://github.com/guzzle/guzzle/blob/master/src/functions.p... is the actual code, although it's pulled into the guzzle collection: https://github.com/guzzle/guzzle/blob/master/src/Collection....
Why doesn't it just take an array? That way, it would be a simple reduction:
function get_path($data, $path) {
return array_reduce(
$path,
function($result, $index) {
return (is_array($result) && isset($result[$index]))? $result[$index] : NULL;
},
$data);
}
Also, requiring 'strings without slashes' is a pretty bad idea in PHP in particular, since it's meant for Web programming. This means a) we tend to have / in strings due to URLs and b) someone will inevitably pass user input as one of these components, which would allow a very limited form of code injection attack.