ApiFormatWddx.php

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<?php
class ApiFormatWddx extends ApiFormatBase {

    public function getMimeType() {
        return 'text/xml';
    }

    public function execute() {
        // Some versions of PHP have a broken wddx_serialize_value, see
        // PHP bug 45314. Test encoding an affected character (U+00A0)
        // to avoid this.
        $expected =
            "<wddxPacket version='1.0'><header/><data><string>\xc2\xa0</string></data></wddxPacket>";
        if ( function_exists( 'wddx_serialize_value' )
            && !$this->getIsHtml()
            && wddx_serialize_value( "\xc2\xa0" ) == $expected
        ) {
            $this->printText( wddx_serialize_value( $this->getResultData() ) );
        } else {
            // Don't do newlines and indentation if we weren't asked
            // for pretty output
            $nl = ( $this->getIsHtml() ? "\n" : '' );
            $indstr = ' ';
            $this->printText( "<?xml version=\"1.0\"?>$nl" );
            $this->printText( "<wddxPacket version=\"1.0\">$nl" );
            $this->printText( "$indstr<header/>$nl" );
            $this->printText( "$indstr<data>$nl" );
            $this->slowWddxPrinter( $this->getResultData(), 4 );
            $this->printText( "$indstr</data>$nl" );
            $this->printText( "</wddxPacket>$nl" );
        }
    }

    function slowWddxPrinter( $elemValue, $indent = 0 ) {
        $indstr = ( $this->getIsHtml() ? str_repeat( ' ', $indent ) : '' );
        $indstr2 = ( $this->getIsHtml() ? str_repeat( ' ', $indent + 2 ) : '' );
        $nl = ( $this->getIsHtml() ? "\n" : '' );
        if ( is_array( $elemValue ) ) {
            // Check whether we've got an associative array (<struct>)
            // or a regular array (<array>)
            $cnt = count( $elemValue );
            if ( $cnt == 0 || array_keys( $elemValue ) === range( 0, $cnt - 1 ) ) {
                // Regular array
                $this->printText( $indstr . Xml::element( 'array', array(
                    'length' => $cnt ), null ) . $nl );
                foreach ( $elemValue as $subElemValue ) {
                    $this->slowWddxPrinter( $subElemValue, $indent + 2 );
                }
                $this->printText( "$indstr</array>$nl" );
            } else {
                // Associative array (<struct>)
                $this->printText( "$indstr<struct>$nl" );
                foreach ( $elemValue as $subElemName => $subElemValue ) {
                    $this->printText( $indstr2 . Xml::element( 'var', array(
                        'name' => $subElemName
                    ), null ) . $nl );
                    $this->slowWddxPrinter( $subElemValue, $indent + 4 );
                    $this->printText( "$indstr2</var>$nl" );
                }
                $this->printText( "$indstr</struct>$nl" );
            }
        } elseif ( is_int( $elemValue ) || is_float( $elemValue ) ) {
            $this->printText( $indstr . Xml::element( 'number', null, $elemValue ) . $nl );
        } elseif ( is_string( $elemValue ) ) {
            $this->printText( $indstr . Xml::element( 'string', null, $elemValue ) . $nl );
        } elseif ( is_bool( $elemValue ) ) {
            $this->printText( $indstr . Xml::element( 'boolean',
                array( 'value' => $elemValue ? 'true' : 'false' ) ) . $nl
            );
        } else {
            ApiBase::dieDebug( __METHOD__, 'Unknown type ' . gettype( $elemValue ) );
        }
    }

    public function getDescription() {
        return 'Output data in WDDX format' . parent::getDescription();
    }
}