StubObject.php

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<?php
class StubObject {
        var $mGlobal, $mClass, $mParams;

        function __construct( $global = null, $class = null, $params = array() ) {
                $this->mGlobal = $global;
                $this->mClass = $class;
                $this->mParams = $params;
        }

        static function isRealObject( $obj ) {
                return is_object( $obj ) && !($obj instanceof StubObject);
        }

        function _call( $name, $args ) {
                $this->_unstub( $name, 5 );
                return call_user_func_array( array( $GLOBALS[$this->mGlobal], $name ), $args );
        }

        function _newObject() {
                return MWFunction::newObj( $this->mClass, $this->mParams );
        }

        function __call( $name, $args ) {
                return $this->_call( $name, $args );
        }

        function _unstub( $name = '_unstub', $level = 2 ) {
                static $recursionLevel = 0;

                if ( !($GLOBALS[$this->mGlobal] instanceof StubObject) ) {
                        return $GLOBALS[$this->mGlobal]; // already unstubbed.
                }

                if ( get_class( $GLOBALS[$this->mGlobal] ) != $this->mClass ) {
                        $fname = __METHOD__ . '-' . $this->mGlobal;
                        wfProfileIn( $fname );
                        $caller = wfGetCaller( $level );
                        if ( ++$recursionLevel > 2 ) {
                                throw new MWException( "Unstub loop detected on call of \${$this->mGlobal}->$name from $caller\n" );
                        }
                        wfDebug( "Unstubbing \${$this->mGlobal} on call of \${$this->mGlobal}::$name from $caller\n" );
                        $GLOBALS[$this->mGlobal] = $this->_newObject();
                        --$recursionLevel;
                        wfProfileOut( $fname );
                }
        }
}

class StubContLang extends StubObject {

        function __construct() {
                wfDeprecated( __CLASS__, '1.18' );
                parent::__construct( 'wgContLang' );
        }

        function __call( $name, $args ) {
                return $this->_call( $name, $args );
        }

        function _newObject() {
                global $wgLanguageCode;
                $obj = Language::factory( $wgLanguageCode );
                $obj->initEncoding();
                $obj->initContLang();
                return $obj;
        }
}

class StubUserLang extends StubObject {

        function __construct() {
                parent::__construct( 'wgLang' );
        }

        function __call( $name, $args ) {
                return $this->_call( $name, $args );
        }

        function _newObject() {
                return RequestContext::getMain()->getLanguage();
        }
}