Method: getValueAtIndex($name , $index)

Fetch value of $index in the array file property $name. Will be returned as a plain text string. If value is not set or does not exist, will return null.

Arguments:

$name (STRING)
$index (INT)

Returns:

STRING

Example:

$this->document->getValue('document_images' , 0);

Example 2:

for($i=0; $i<=12; $i++){
    echo $this->document->getValue('document_images' , $i);
}