As you know ArrayObject is not an array so you can't use the built in array functions. Here's a trick around that:
Extend the ArrayObject class with your own and implement this magic method:
<?php
public function __call($func, $argv)
{
if (!is_callable($func) || substr($func, 0, 6) !== 'array_')
{
throw new BadMethodCallException(__CLASS__.'->'.$func);
}
return call_user_func_array($func, array_merge(array($this->getArrayCopy()), $argv));
}
?>
Now you can do this with any array_* function:
<?php
$yourObject->array_keys();
?>
- Don't forget to ommit the first parameter - it's automatic!
Note: You might want to write your own functions if you're working with large sets of data.
