Visit object with a path (object and array)

example.php

<?php

include_once __DIR__ . '/helpers.php';

$data = ((object)[
  "name" => "Matteo",
  "surname" => "Gaggiano",
  "age" => 25,
  "github" => ((object)[
    "username" => "Marchrius",
    "url" => "https://github.com/Marchrius"
  ]),
  "repositories" => ((object)[
    "own" => [
      [
        "name" => "angular-mimetype",
        "link" => "https://github.com/Marchrius/angular-mimetype",
        "stars" => 0
      ]
    ],
    "other" => [
      [
        "name" => "tracker",
        "link" => "https://github.com/antonioribeiro/tracker",
        "starts" => 1291
      ],
      [
        "name" => "color-thief-php",
        "link" => "https://github.com/ksubileau/color-thief-php",
        "starts" => 364
      ],
      [
        "name" => "angular-moment",
        "link" => "https://github.com/urish/angular-moment",
        "starts" => 2615
      ]
    ]
  ])
]);

helpers.php

<?php

if (!function_exists("isDotFirst")) {
  function isDotFirst($str) {
    $posDot = strpos($str, '.');
    $posSquare = strpos($str, '[');
    $posDot = $posDot === false ? PHP_INT_MAX : $posDot;
    $posSquare = $posSquare === false ? PHP_INT_MAX : $posSquare;
    return $posDot < $posSquare;
  }
}

if (!function_exists("isSquareFirst")) {
  function isSquareFirst($str) {
    $posDot = strpos($str, '.');
    $posSquare = strpos($str, '[');
    $posDot = $posDot === false ? PHP_INT_MAX : $posDot;
    $posSquare = $posSquare === false ? PHP_INT_MAX : $posSquare;
    return $posSquare < $posDot;
  }
}

if (!function_exists("extractIndexKey")) {
  function extractIndexKey($str) {
    $start = strpos($str, '[') + 1;
    $end = strpos($str, ']', $start);
    $indexKey = substr($str, $start, $end - $start);
    if (is_numeric($indexKey))
      return intval($indexKey);
    return $indexKey;
  }
}

// 'path.to[indexKey].property[0]'
if (!function_exists("visitObject")) {
  function visitObject($object, $path = null, $default = null) {
    // no path. single property
    if (null == $path || '' == $path)
      return $object;
    if (isDotFirst($path)) { // path is like path.to.property
      $explodedPaths = explode('.', $path);
      $segment = array_shift($explodedPaths);
      if (isSquareFirst($segment)) { // has array reference?
        $indexKey = extractIndexKey($segment);
        $backInArray = '[' . $indexKey . ']';
        $segment = str_replace($backInArray, '', $segment);
        array_unshift($explodedPaths, $backInArray);
      }
      $path = implode('.', $explodedPaths);
      if (!is_object($object) || !property_exists($object, $segment))
        return $default;
      return visitObject($object->{$segment}, $path, $default);
    } else if (isSquareFirst($path)) { // path is like [0]
      if (($sPos = strpos($path, '[')) > 0 && $sPos !== false) {
          $segment = substr($path, 0, $sPos);
          $path = str_replace($segment, '', $path);
          if (!is_object($object) || !property_exists($object, $segment))
            return $default;
          return visitObject($object->{$segment}, $path, $default);
      }
      $explodedPaths = explode('.', $path);
      $segment = array_shift($explodedPaths);
      $indexKey = extractIndexKey($segment);
      $path = implode('.', $explodedPaths);
      if (!is_array($object) && isset($object[$indexKey]))
        return $default;
      return visitObject($object[$indexKey], $path, $default);
    } else { // path
      if (is_object($object) && property_exists($object, $path)) {
        return $object->{$path};
      }
      if (is_array($object) && isset($object[$path])) {
        return $object[$path];
      }
      return $default;
    }
  }
}