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@ 2022-06-14T08:20:15Z

<?php

function array_to_xml( $data, &$xml_data ) {
        foreach( $data as $key => $value ) {
          foreach($value as $innerkey => $innervalue) {
            $v = $innervalue['@value'];
            $t = "";
            if(isset($innervalue['@attributes']['typ'])) {
                $t = $innervalue['@attributes']['typ'];  
            }
            $kontakt = $xml_data->addChild('kontakt', $v);
            $kontakt->addAttribute('typ', $t);
          }
        }
    }

$data = array("kontakt"=>[ 
1=>[
     '@value' => 'abc@abc.pl',
     '@attributes' => ['typ' => 'email'],
    ],
2=>[
     '@value' => '3123453141',
     '@attributes' => ['typ' => 'telefon'],
            ],
          ]
);
$xml_data = new SimpleXMLElement('<test></test>') ;
array_to_xml($data,$xml_data);
echo $xml_data->asXML();

Output for git.master, git.master_jit, rfc.property-hooks: <?xml version="1.0"?> <test><kontakt typ="email">abc@abc.pl</kontakt><kontakt typ="telefon">3123453141</kontakt></test>

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2022-12-01 RFC: Property hooks - included in PHP 8.4
2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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