A dedicated set of entry properties is stored in XML during conversion:

• XML node attribute "index" stores original entry key if XML node name differs from entry key
• XML node attribute "type" stores entry value type ("bool", "int", "double", ...)
• XML node attribute "base64" specifies if entry value is binary (for example an image) These attributes are interpreted during decoding of the XML string with XmlDecoder::decode().

Specific encoding configuration can be set by $additionalOptions - for the full array or array paths. For example

$input = [
     'numeric' => [
         'value1',
         'value2'
     ],
     'numeric-n-index' => [
         'value1',
         'value2'
     ],
     'nested' => [
         'node1' => 'value1',
         'node2' => [
             'node' => 'value'
         ]
     ]
];
$additionalOptions = [
     'useIndexTagForNum' => 'numbered-index'
     'alt_options' => [
         '/numeric-n-index' => [
             'useNindex' => true
         ],
         '/nested' => [
             'useIndexTagForAssoc' => 'nested-outer',
             'clearStackPath' => true,
             'alt_options' => [
                 '/nested-outer' => [
                     'useIndexTagForAssoc' => 'nested-inner'
                 ]
             ]
         ]
     ]
];

=>

<phparray>
     <numeric type="array">
         <numbered-index index="0">value1</numbered-index>
         <numbered-index index="1">value2</numbered-index>
     </numeric>
     <numeric-n-index type="array">
         <n0>value1</n0>
         <n1>value2</n1>
     </numeric-n-index>
     <nested type="array">
         <nested-outer index="node1">value1</nested-outer>
         <nested-outer index="node2" type="array">
             <nested-inner index="node">value</nested-inner>
         </nested-outer>
     </nested>
</phparray>

Available options are:

• grandParentTagMap[grandParentTagName/parentTagName] [string] Convert array key X to XML node name "{grandParentTagMap}" with node attribute "index=X"
  • if grand-parent is "{grandParentTagName}" and parent node is "{parentTagName}".
• parentTagMap[parentTagName:_IS_NUM] [string] Convert array key X to XML node name "{parentTagMap}" with node attribute "index=X"
  • if parent node is "{parentTagName}" and current node is number-indexed.
• parentTagMap[parentTagName:nodeName] [string] Convert array key X to XML node name "{parentTagMap}" with node attribute "index=X"
  • if parent node is "{parentTagName}" and current node is "{nodeName}".
• parentTagMap[parentTagName] [string] Convert array key X to XML node name "{parentTagMap}" with node attribute "index=X"
  • if parent node is "{parentTagName}".
• useNindex [bool] Convert number-indexed array key X to XML node name "nX".
• useIndexTagForNum [string] Convert number-indexed array key X to XML node name "{useIndexTagForNum}" with node attribute "index=X".
• useIndexTagForAssoc [string] Convert associative array key X to XML node name "{useIndexTagForAssoc}" with node attribute "index=X".
• disableTypeAttrib [bool|int] Disable node attribute "type" for all value types (true = disable for all except arrays, 2 = disable for all).
• alt_options[/.../nodeName] [array] Set new options for specific array path.
• clearStackPath [bool] Resetting internal counter when descending the array hierarchy: Allows using relative array path in nested "alt_options" instead of absolute path.