Frontend.php

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<?php

//require_once 'PEAR.php';

$GLOBALS['_PEAR_FRONTEND_CLASS'] = 'PEAR_Frontend_CLI';

$GLOBALS['_PEAR_FRONTEND_SINGLETON'] = null;

class PEAR_Frontend extends PEAR
{
    public static function &singleton($type = null)
    {
        if ($type === null) {
            if (!isset($GLOBALS['_PEAR_FRONTEND_SINGLETON'])) {
                $a = false;
                return $a;
            }
            return $GLOBALS['_PEAR_FRONTEND_SINGLETON'];
        }
 
        $a = PEAR_Frontend::setFrontendClass($type);
        return $a;
    }

    public static function &setFrontendClass($uiclass)
    {
        if (is_object($GLOBALS['_PEAR_FRONTEND_SINGLETON']) &&
              is_a($GLOBALS['_PEAR_FRONTEND_SINGLETON'], $uiclass)) {
            return $GLOBALS['_PEAR_FRONTEND_SINGLETON'];
        }
 
        if (!class_exists($uiclass)) {
            $file = str_replace('_', '/', $uiclass) . '.php';
            if (PEAR_Frontend::isIncludeable($file)) {
                include_once $file;
            }
        }
 
        if (class_exists($uiclass)) {
            $obj = new $uiclass;
            // quick test to see if this class implements a few of the most
            // important frontend methods
            if (is_a($obj, 'PEAR_Frontend')) {
                $GLOBALS['_PEAR_FRONTEND_SINGLETON'] = &$obj;
                $GLOBALS['_PEAR_FRONTEND_CLASS'] = $uiclass;
                return $obj;
            }
 
            $err = PEAR::raiseError("not a frontend class: $uiclass");
            return $err;
        }
 
        $err = PEAR::raiseError("no such class: $uiclass");
        return $err;
    }

    public static function &setFrontendObject($uiobject)
    {
        if (is_object($GLOBALS['_PEAR_FRONTEND_SINGLETON']) &&
              is_a($GLOBALS['_PEAR_FRONTEND_SINGLETON'], get_class($uiobject))) {
            return $GLOBALS['_PEAR_FRONTEND_SINGLETON'];
        }
 
        if (!is_a($uiobject, 'PEAR_Frontend')) {
            $err = PEAR::raiseError('not a valid frontend class: (' .
                get_class($uiobject) . ')');
            return $err;
        }
 
        $GLOBALS['_PEAR_FRONTEND_SINGLETON'] = &$uiobject;
        $GLOBALS['_PEAR_FRONTEND_CLASS'] = get_class($uiobject);
        return $uiobject;
    }

    public static function isIncludeable($path)
    {
        if (file_exists($path) && is_readable($path)) {
            return true;
        }
 
        $fp = @fopen($path, 'r', true);
        if ($fp) {
            fclose($fp);
            return true;
        }
 
        return false;
    }

    function setConfig(&$config)
    {
    }

    static function addTempFile($file)
    {
        $GLOBALS['_PEAR_Common_tempfiles'][] = $file;
    }

    function log($msg, $append_crlf = true)
    {
    }

    function runPostinstallScripts(&$scripts)
    {
    }

    function outputData($data, $command = '_default')
    {
    }

    function userDialog($command, $prompts, $types = array(), $defaults = array())
    {
    }
}