Online PHP editor | output for 5Qati

<?php $context = [ 'mes' => [ 'attributes' => [ 't' => 'AddEvent', 'id' => 'test_id', 'text' => 'русский текст' ], 'ev' => [ 'attributes' => [ 'evt' => 'packet20130828ki3si0', 'src' => 'NVV', 'st' => 'test', 'start' => '12423511247', 'stop' => '12423991978', 'addrtype' => 'MB', 'clntID' => '+380957700418', 'lg' => '', 'bank' => '', 'lang' => '', 'prior' => '', 'brnm' => '', 'extref' => '', 'intref' => '', 'extaddrtype' => '', 'extaddrid' => '', 'recall' => '', ], 'attr' => [ [ 'attributes' => [ 'code' => '1', 'val' => '11', ], ], [ 'attributes' => [ 'code' => '2', 'val' => '12', ], ], ], 'hist' => [ [ 'attributes' => [ 'st' => '', 'ch' => '', 'lg' => '', 'con' => '', 'com' => '', 'addrtype' => '', 'addrid' => '', 'dt' => '', 'contactId' => '', ], ], ], ], ], ]; class Conv { protected $res; protected $context; public function __construct(array $context) { if (count($context) != 1) { throw new Exception('Must be only one root element', 500); } $this->context = $context; $this->init(key($this->context)); } public function conv() { return $this->a2x(current($this->context), $this->res)->asXML(); } protected function init($root) { $this->res = new SimpleXMLElement("<{$root}/>"); } protected function addAttribs(array $attribs, SimpleXMLElement $node) { if (count($attribs)) { foreach ($attribs as $attrKey => $attrVal) { $node->addAttribute($attrKey, $attrVal); } } return $node; } protected function tryToAddAttribs(array $inner, SimpleXMLElement $node) { if (isset($inner['attributes'])) { $this->addAttribs($inner['attributes'], $node); unset($inner['attributes']); } return $node; } protected function addEnum(array $items, SimpleXMLElement $node, $caption) { $this->dump('adding enum', ['caption'=>$caption,'items'=>$items]); if (count($items)) { foreach ($items as $item) { $subNode = $node->addChild($caption); $this->tryToAddAttribs($item, $subNode); unset($item['attributes']); } } } protected function a2x(array $inner, SimpleXMLElement $node) { $this->tryToAddAttribs($inner, $node); unset($inner['attributes']); if (count($inner)) { foreach ($inner as $key => $value) { $this->dump('cur', ['key'=>$key,'val'=>$value]); if ($this->isEnumeration($value)) { $this->dump('is enum', $value); $this->addEnum($value, $node, $key); } else { $this->dump('is NOT enum', $value); $subNode = $node->addChild($key); $this->a2x($value, $subNode); } } } return $this->res; } protected function isEnumeration(array $items) { $keys = array_keys($items); foreach ($keys as $key) { if (!is_numeric($key)) { return false; } } return true; } protected function dump($title, $var) { if (false) { echo $title . ': ', json_encode($var) . '<hr/>'; } } } $a2x = new Conv($context); var_dump($a2x->conv());