gistfile1.aw

<?php
// Don't touch these
$elementLevel = array(
    0 => 'zero',
    1 => 'one',
    2 => 'two',
    3 => 'three',
    4 => 'four',
    5 => 'five',
    6 => 'six',
    7 => 'seven',
    8 => 'eight',
    9 => 'nine',
    10 => 'ten'
);
$xmlElement = array(
    'level' => 6,
    'tag' => 'this-is-a-tag',
    'value' => 'this-is-a-value'
);

$responseStruct = array(
    'one' => array(
        'two' => array(
            'three' => array(
                'four' => array(
                    'five' => array(
                        'six' => array(
                            'seven' => array(
                                'eight' => array(
                                    'nine' => array(
                                        'ten' => array(
                        
                                        )
                                    )
                                )
                            )
                        )
                    )
                )
            )
        )
    )
);
// They're what's missing

$startLevel = 1;                                                                                                 
$evalStatement = '$responseStruct';                                                                              
while($startLevel < $xmlElement['level']) {                                                                      
	$evalStatement .= '[strtolower($elementLevel['. $startLevel .'])]';                                             
	$startLevel++;                                                                                                  
}                                                                                                                
$evalStatement .= '[strtolower($xmlElement[\'tag\'])] = $xmlElement[\'value\'];';                                
eval($evalStatement);
var_dump($responseStruct);