array_path

gistfile1.php

<?php

function array_path($array, $path) {
    $context = $array;
    $parts = explode('.', $path);
    while($key = array_shift($parts)) {
        if(!is_array($context)) {
            return NULL;
        }
        if(!array_key_exists($key, $context)) {
            return NULL;
        }
        $context = $context[$key];
    }
    return $context;
}


$array['a']['b']['c']['d']['e'] = 42;

var_dump(array_path($array, 'a.b.c.d.e'));
var_dump(array_path($array, 'a.b.c.d.e.f'));
var_dump(array_path($array, 'a.b.c.d'));


int(42)

NULL

array(1) {
  ["e"]=>
  int(42)
}