A perhaps naive (but working) way to get info from a variable depth multidimensional associative array

ArrayMap.php

<?php 

class ArrayMap{
  
  private $array = array();
  private $map;
  
  public function __construct( array $array, $delimiter = '\\' ){
    $this->array = $array;
    $this->flattenMap( $this->array );
    $this->delimiter = $delimiter;
	}
  
  public function __get( $key ){
    $key = '_'. $key;
    if ( isset($this->map[ $key ]) ) {
      return $this->map[ $key ];
    }
    return '';
	}
  
  /**
   * Flatten the given array
   **/
  private function flattenMap( $array, $seed_key = '' ){
    foreach ( $array as $key => $val ) {
      if ( is_array($val) ) {
        $this->flattenMap( $val, $seed_key .'_'. $key );
      } else {
        $this->map[ $seed_key .'_'. $key ] = $val;
      }
    }
	}
  
  /**
   * Get the value from a given path
   * @param array|string $path Path that will be searched. If it's a string, delimiter it's required
   * @param string $delimiter The string that will be used as delimiter if $path it's a string
   */
  public function getPath( $path, $delimiter = '' ){
    $path = $this->parsePath( $path, $delimiter );
    return $this->__get( $path );
	}
  
  /**
   * Translate the give path to a searchable path
   * @param array $path
   */
  private function parsePath( $path , $delimiter = '' ){
    if ( is_string($path) ) {
      if ( empty($delimiter) ) {
        trigger_error("$delimiter it's required when $path it's a string", E_USER_ERROR);
      }
      $path = implode('_', explode($delimiter, $path));
      } else {
        $path = implode( '_', $path );
      }
    return $path;
  }
}

$array = array(
  'lipsum' => 'lorem ipsum dolor sit amet',
  'foo' => 'bar',
  'panagram' => array(
    'fox' => 'quick brown fox jumps over the lazy dog',
    'passerby' => 'passerby were amazed by the unusually large amounts of blood'
  )
);

$array_map = new ArrayMap( $array );
echo $array_map->getPath( array('lipsum') );
echo $array_map->getPath( array('panagram', 'fox') );
echo $array_map->panagram_fox;
echo $array_map->getPath( 'panagram|passerby', '|' );
echo $array_map->foo;