Converting php array with attributes to XML

Question

I'm working on an XML library, that can create / parse xml's from arrays/jsons. I managed to write the parser with xml_parser (and google help :p) cause SimpleXML wasn't good enough for what I'm doing.

I've managed to create an array that looks something like that:

Array 
(
[flow] => Array
    (
        [math] => Array
            (
                [apply] => Array
                    (
                        [lt] => Array
                            (
                            )

                        [apply] => Array
                            (
                                [divide] => Array
                                    (
                                    )

                                [apply] => Array
                                    (
                                        [minus] => Array
                                            (
                                            )
                                    )
                            )

                        [otherStuff] => 0
                    )

            )

        [true] => Array
            (


            )

        [true_attr] => Array
            (
                [xsi:type] => SomeStuff
                [id] => 2
            )

    )

[flow_attr] => Array
    (
        [id] => 0
        [xmlns:xsi] => http://www.w3.org/2001/XMLSchema-instance
    )
)

As you can see, it should look something like this ( not the best example :p ):

<flow id="0">
 <math>
 <lalaa/>
  <appyl>
 </apply>
  </math>
</flow>

Note that empty arrays should end with /> for example , and so on

As you can see I separated the node it self to node_attr that contains the attrs of the nodes. Like flow_attr, true_attr.

Anyone have an idea how to convert this array back to xml? I'm just lost and don't know what to do.

Thanks for the help!

Answer 1

function recurse2xml ($array, &$string = "") {
    foreach ($array as $key => $subArray) {
        if (substr($key, -5) == "_attr")
            continue;
        $attrs = "";
        if (isset($array["$key_attr"]))
            foreach ($array["$key_attr"] as $attr => $value)
                $attrs .= " $attr='".str_replace($value, "'", "\\'")."'";
        if (empty($subArray)) {
            $string .= "<$key$attrs />";
        } else {
            $string .= "<$key$attrs>";
            if (is_scalar($subArray))
                $string .= $subArray;
            else
                recurse2xml($subArray, $string);
            $string .= "</$key>";
        }
    }
    return $string;
}

This function called with recurse2xml($array); expands your array tree into an xml tree (string form).

Answer 2

Try Array2XML, worked flawlesly for me. Including CDATA Parts, etc.