src/PEAR/Config.php
function PEAR_Config($user_file = '', $system_file = '', $ftp_file = false,
                         $strict = true)
    {
        $this->PEAR();
        PEAR_Installer_Role::initializeConfig($this);
        $sl = DIRECTORY_SEPARATOR;
        if (empty($user_file)) {
            if (OS_WINDOWS) {
                $user_file = PEAR_CONFIG_SYSCONFDIR . $sl . 'pear.ini';
            } else {
                $user_file = getenv('HOME') . $sl . '.pearrc';
            }
        }

        if (empty($system_file)) {
            $system_file = PEAR_CONFIG_SYSCONFDIR . $sl;
            if (OS_WINDOWS) {
                $system_file .= 'pearsys.ini';
            } else {
                $system_file .= 'pear.conf';
            }
        }

        $this->layers = array_keys($this->configuration);
        $this->files['user']   = $user_file;
        $this->files['system'] = $system_file;
        if ($user_file && file_exists($user_file)) {
            $this->pushErrorHandling(PEAR_ERROR_RETURN);
            $this->readConfigFile($user_file, 'user', $strict);
            $this->popErrorHandling();
            if ($this->_errorsFound > 0) {
                return;
            }
        }

        if ($system_file && @file_exists($system_file)) {
            $this->mergeConfigFile($system_file, false, 'system', $strict);
            if ($this->_errorsFound > 0) {
                return;
            }

        }

        if (!$ftp_file) {
            $ftp_file = $this->get('remote_config');
        }

        if ($ftp_file && defined('PEAR_REMOTEINSTALL_OK')) {
            $this->readFTPConfigFile($ftp_file);
        }

        foreach ($this->configuration_info as $key => $info) {
            $this->configuration['default'][$key] = $info['default'];
        }

        $this->_registry['default'] = &new PEAR_Registry($this->configuration['default']['php_dir']);
        $this->_registry['default']->setConfig($this, false);
        $this->_regInitialized['default'] = false;
        //$GLOBALS['_PEAR_Config_instance'] = &$this;
    }
function PEAR_Config($user_file = '', $system_file = '', $ftp_file = false,
                         $strict = true)
    {
        $this->PEAR();
        PEAR_Installer_Role::initializeConfig($this);
        $sl = DIRECTORY_SEPARATOR;
        if (empty($user_file)) {
            if (OS_WINDOWS) {
                $user_file = PEAR_CONFIG_SYSCONFDIR . $sl . 'pear.ini';
            } else {
                $user_file = getenv('HOME') . $sl . '.pearrc';
            }
        }

        if (empty($system_file)) {
            $system_file = PEAR_CONFIG_SYSCONFDIR . $sl;
            if (OS_WINDOWS) {
                $system_file .= 'pearsys.ini';
            } else {
                $system_file .= 'pear.conf';
            }
        }

        $this->layers = array_keys($this->configuration);
        $this->files['user']   = $user_file;
        $this->files['system'] = $system_file;
        if ($user_file && file_exists($user_file)) {
            $this->pushErrorHandling(PEAR_ERROR_RETURN);
            $this->readConfigFile($user_file, 'user', $strict);
            $this->popErrorHandling();
            if ($this->_errorsFound > 0) {
                return;
            }
        }

        if ($system_file && @file_exists($system_file)) {
            $this->mergeConfigFile($system_file, false, 'system', $strict);
            if ($this->_errorsFound > 0) {
                return;
            }

        }

        if (!$ftp_file) {
            $ftp_file = $this->get('remote_config');
        }

        if ($ftp_file && defined('PEAR_REMOTEINSTALL_OK')) {
            $this->readFTPConfigFile($ftp_file);
        }

        foreach ($this->configuration_info as $key => $info) {
            $this->configuration['default'][$key] = $info['default'];
        }

        $this->_registry['default'] = &new PEAR_Registry($this->configuration['default']['php_dir']);
        $this->_registry['default']->setConfig($this, false);
        $this->_regInitialized['default'] = false;
        //$GLOBALS['_PEAR_Config_instance'] = &$this;
    }
Constructor.

@param string file to read user-defined options from
@param string file to read system-wide defaults from
@param bool   determines whether a registry object "follows"
the value of php_dir (is automatically created
and moved when php_dir is changed)
@param bool   if true, fails if configuration files cannot be loaded

@access public

@see PEAR_Config::singleton