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;
    }

    static function unstub( $obj ) {
        if ( $obj instanceof StubObject ) {
            $obj->_unstub( 'unstub', 3 );
        }
    }

    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 ) {
                wfProfileOut( $fname );
                throw new MWException( "Unstub loop detected on call of \${$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();
    }
}