YiiRequirementChecker 类

                function check($requirements)
{
    if (is_string($requirements)) {
        $requirements = require $requirements;
    }
    if (!is_array($requirements)) {
        $this->usageError('Requirements must be an array, "' . gettype($requirements) . '" has been given!');
    }
    if (!isset($this->result) || !is_array($this->result)) {
        $this->result = array(
            'summary' => array(
                'total' => 0,
                'errors' => 0,
                'warnings' => 0,
            ),
            'requirements' => array(),
        );
    }
    foreach ($requirements as $key => $rawRequirement) {
        $requirement = $this->normalizeRequirement($rawRequirement, $key);
        $this->result['summary']['total']++;
        if (!$requirement['condition']) {
            if ($requirement['mandatory']) {
                $requirement['error'] = true;
                $requirement['warning'] = true;
                $this->result['summary']['errors']++;
            } else {
                $requirement['error'] = false;
                $requirement['warning'] = true;
                $this->result['summary']['warnings']++;
            }
        } else {
            $requirement['error'] = false;
            $requirement['warning'] = false;
        }
        $this->result['requirements'][] = $requirement;
    }
    return $this;
}

            

                function checkPhpExtensionVersion($extensionName, $version, $compare = '>=')
{
    if (!extension_loaded($extensionName)) {
        return false;
    }
    $extensionVersion = phpversion($extensionName);
    if (empty($extensionVersion)) {
        return false;
    }
    if (strncasecmp($extensionVersion, 'PECL-', 5) === 0) {
        $extensionVersion = substr($extensionVersion, 5);
    }
    return version_compare($extensionVersion, $version, $compare);
}

            

                function checkPhpIniOff($name)
{
    $value = ini_get($name);
    if (empty($value)) {
        return true;
    }
    return (strtolower($value) === 'off');
}

            

                function checkPhpIniOn($name)
{
    $value = ini_get($name);
    if (empty($value)) {
        return false;
    }
    return ((int) $value === 1 || strtolower($value) === 'on');
}

            

                function checkUploadMaxFileSize($min = null, $max = null)
{
    $postMaxSize = ini_get('post_max_size');
    $uploadMaxFileSize = ini_get('upload_max_filesize');
    if ($min !== null) {
        $minCheckResult = $this->compareByteSize($postMaxSize, $min, '>=') && $this->compareByteSize($uploadMaxFileSize, $min, '>=');
    } else {
        $minCheckResult = true;
    }
    if ($max !== null) {
        $maxCheckResult = $this->compareByteSize($postMaxSize, $max, '<=') && $this->compareByteSize($uploadMaxFileSize, $max, '<=');
    } else {
        $maxCheckResult = true;
    }
    return ($minCheckResult && $maxCheckResult);
}

            

                function checkYii()
{
    return $this->check(dirname(__FILE__) . DIRECTORY_SEPARATOR . 'requirements.php');
}

            

                function compareByteSize($a, $b, $compare = '>=')
{
    $compareExpression = '(' . $this->getByteSize($a) . $compare . $this->getByteSize($b) . ')';
    return $this->evaluateExpression($compareExpression);
}

            

                function evaluateExpression($expression)
{
    return eval('return ' . $expression . ';');
}

            

                function getByteSize($verboseSize)
{
    if (empty($verboseSize)) {
        return 0;
    }
    if (is_numeric($verboseSize)) {
        return (int) $verboseSize;
    }
    $sizeUnit = trim($verboseSize, '0123456789');
    $size = trim(str_replace($sizeUnit, '', $verboseSize));
    if (!is_numeric($size)) {
        return 0;
    }
    switch (strtolower($sizeUnit)) {
        case 'kb':
        case 'k':
            return $size * 1024;
        case 'mb':
        case 'm':
            return $size * 1024 * 1024;
        case 'gb':
        case 'g':
            return $size * 1024 * 1024 * 1024;
        default:
            return 0;
    }
}

            

                function getNowDate()
{
    return @strftime('%Y-%m-%d %H:%M', time());
}

            

                function getResult()
{
    if (isset($this->result)) {
        return $this->result;
    } else {
        return null;
    }
}

            

                function getServerInfo()
{
    return isset($_SERVER['SERVER_SOFTWARE']) ? $_SERVER['SERVER_SOFTWARE'] : '';
}

            

                function normalizeRequirement($requirement, $requirementKey = 0)
{
    if (!is_array($requirement)) {
        $this->usageError('Requirement must be an array!');
    }
    if (!array_key_exists('condition', $requirement)) {
        $this->usageError("Requirement '{$requirementKey}' has no condition!");
    } else {
        $evalPrefix = 'eval:';
        if (is_string($requirement['condition']) && strpos($requirement['condition'], $evalPrefix) === 0) {
            $expression = substr($requirement['condition'], strlen($evalPrefix));
            $requirement['condition'] = $this->evaluateExpression($expression);
        }
    }
    if (!array_key_exists('name', $requirement)) {
        $requirement['name'] = is_numeric($requirementKey) ? 'Requirement #' . $requirementKey : $requirementKey;
    }
    if (!array_key_exists('mandatory', $requirement)) {
        if (array_key_exists('required', $requirement)) {
            $requirement['mandatory'] = $requirement['required'];
        } else {
            $requirement['mandatory'] = false;
        }
    }
    if (!array_key_exists('by', $requirement)) {
        $requirement['by'] = 'Unknown';
    }
    if (!array_key_exists('memo', $requirement)) {
        $requirement['memo'] = '';
    }
    return $requirement;
}

            

                function render()
{
    if (!isset($this->result)) {
        $this->usageError('Nothing to render!');
    }
    $baseViewFilePath = dirname(__FILE__) . DIRECTORY_SEPARATOR . 'views';
    if (!empty($_SERVER['argv'])) {
        $viewFileName = $baseViewFilePath . DIRECTORY_SEPARATOR . 'console' . DIRECTORY_SEPARATOR . 'index.php';
    } else {
        $viewFileName = $baseViewFilePath . DIRECTORY_SEPARATOR . 'web' . DIRECTORY_SEPARATOR . 'index.php';
    }
    $this->renderViewFile($viewFileName, $this->result);
}

            

                function renderViewFile($_viewFile_, $_data_ = null, $_return_ = false)
{
    // we use special variable names here to avoid conflict when extracting data
    if (is_array($_data_)) {
        extract($_data_, EXTR_PREFIX_SAME, 'data');
    } else {
        $data = $_data_;
    }
    if ($_return_) {
        ob_start();
        ob_implicit_flush(false);
        require $_viewFile_;
        return ob_get_clean();
    } else {
        require $_viewFile_;
    }
}

            

                function usageError($message)
{
    echo "Error: $message\n\n";
    exit(1);
}