/**
* Checks if $key exists in current array as index. If it exists, true is returned.
* If the $key doesn't exist, $default is returned.
* This method supports nested keys access: 'level1.level2.level3'
*
* @param string|StringObject $key Array key. Eg: 'level1.level2.level3'
* @param mixed $default If key is not found, $default is returned.
*
* @return bool|mixed True is returned if the key exists, otherwise $default is returned.
*/
public function keyExistsNested($key, $default = false)
{
$key = StdObjectWrapper::toString($key);
if (strpos($key, '.') !== false) {
$keys = explode('.', trim($key, '.'), 2);
if (!isset($this->val()[$keys[0]])) {
return $default;
}
$sourceArray = new ArrayObject($this->val()[$keys[0]]);
return $sourceArray->keyExistsNested($keys[1], $default);
}
if (array_key_exists($key, $this->val())) {
return true;
}
return $default;
}