HTMLRadioField.php

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<?php

class HTMLRadioField extends HTMLFormField {
    function validate( $value, $alldata ) {
        $p = parent::validate( $value, $alldata );

        if ( $p !== true ) {
            return $p;
        }

        if ( !is_string( $value ) && !is_int( $value ) ) {
            return false;
        }

        $validOptions = HTMLFormField::flattenOptions( $this->getOptions() );

        if ( in_array( strval( $value ), $validOptions, true ) ) {
            return true;
        } else {
            return $this->msg( 'htmlform-select-badoption' )->parse();
        }
    }

    function getInputHTML( $value ) {
        $html = $this->formatOptions( $this->getOptions(), strval( $value ) );

        return $html;
    }

    function formatOptions( $options, $value ) {
        $html = '';

        $attribs = $this->getAttributes( array( 'disabled', 'tabindex' ) );
        $elementFunc = array( 'Html', $this->mOptionsLabelsNotFromMessage ? 'rawElement' : 'element' );

        # @todo Should this produce an unordered list perhaps?
        foreach ( $options as $label => $info ) {
            if ( is_array( $info ) ) {
                $html .= Html::rawElement( 'h1', array(), $label ) . "\n";
                $html .= $this->formatOptions( $info, $value );
            } else {
                $id = Sanitizer::escapeId( $this->mID . "-$info" );
                $radio = Xml::radio( $this->mName, $info, $info === $value, $attribs + array( 'id' => $id ) );
                $radio .= '&#160;' . call_user_func( $elementFunc, 'label', array( 'for' => $id ), $label );

                $html .= ' ' . Html::rawElement(
                    'div',
                    array( 'class' => 'mw-htmlform-flatlist-item' ),
                    $radio
                );
            }
        }

        return $html;
    }

    protected function needsLabel() {
        return false;
    }
}