a::get($array, $key, $default = null)

• $array (array)
  The source array
• $key (mixed)
  The key to look for
• $default (mixed)
  Optional default value, which should be returned if no element has been found
• return (mixed)
  

Example

<?php
$array = array(
  'cat'  => 'miao',
  'dog'  => 'wuff',
  'bird' => 'tweet'
);

echo a::get($array, 'cat');
// output: 'miao'

echo a::get($array, 'elephant', 'shut up');
// output: 'shut up'

$catAndDog = a::get(array('cat', 'dog'));
// result: array(
//   'cat' => 'miao',
//   'dog' => 'wuff'
// );