Description:
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Cannot access array key with hyphen in it if passing a variable as key, but it works with string.

Test script:
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<?php
$test = array('customer-test1' => 1, 'customer-test2' => 2);
function getPost($param) {
	global $test;
    echo $param." = ".$test[$param]."<br/>";
    return isset($test[$param]) ? $test[$param] : NULL;
}
class Customer {
	private $test1;
	private $test2;		
	function __construct() { }
}
$object = new Customer();
$arr = (array)$object;
$newArr = array();
foreach($arr as $key => $val) {
    $newKey = str_replace(get_class($object), "", $key);
    $newArr[$newKey] = getPost(strtolower(get_class($object))."-".$newKey);
}