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by Mikael
05:05 queued 02:06
created

CFastTrackCache.php (6 issues)

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<?php
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/**
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 * Enable a fast track cache with a json representation of the image delivery.
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 *
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 */
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class CFastTrackCache
0 ignored issues
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Coding Style Compatibility introduced by
PSR1 recommends that each class must be in a namespace of at least one level to avoid collisions.

You can fix this by adding a namespace to your class:

namespace YourVendor;

class YourClass { }

When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries.

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{
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    /**
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     * Cache is disabled to start with.
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     */
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    private $enabled = false;
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    /**
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     * Path to the cache directory.
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     */
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    private $path;
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    /**
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     * Filename of current cache item.
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     */
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    private $filename;
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    /**
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     * Container with items to store as cached item.
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     */
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    private $container;
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    /**
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     * Enable or disable cache.
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     *
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     * @param boolean $enable set to true to enable, false to disable
0 ignored issues
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There is no parameter named $enable. Did you maybe mean $enabled?

This check looks for PHPDoc comments describing methods or function parameters that do not exist on the corresponding method or function. It has, however, found a similar but not annotated parameter which might be a good fit.

Consider the following example. The parameter $ireland is not defined by the method finale(...).

/**
 * @param array $germany
 * @param array $ireland
 */
function finale($germany, $island) {
    return "2:1";
}

The most likely cause is that the parameter was changed, but the annotation was not.

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     *
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     * @return $this
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     */
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    public function enable($enabled)
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    {
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        $this->enabled = $enabled;
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        return $this;
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    }
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    /**
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     * Set the path to the cache dir which must exist.
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     *
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     * @param string $path to the cache dir.
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     *
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     * @throws Exception when $path is not a directory.
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     *
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     * @return $this
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     */
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    public function setCacheDir($path)
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    {
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        if (!is_dir($path)) {
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            throw new Exception("Cachedir is not a directory.");
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        }
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        $this->path = rtrim($path, "/");
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        return $this;
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    }
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    /**
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     * Set the filename to store in cache, use the querystring to create that
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     * filename.
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     *
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     * @param array $clear items to clear in $_GET when creating the filename.
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     *
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     * @return string as filename created.
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     */
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    public function setFilename($clear)
0 ignored issues
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setFilename uses the super-global variable $_GET which is generally not recommended.

Instead of super-globals, we recommend to explicitly inject the dependencies of your class. This makes your code less dependent on global state and it becomes generally more testable:

// Bad
class Router
{
    public function generate($path)
    {
        return $_SERVER['HOST'].$path;
    }
}

// Better
class Router
{
    private $host;

    public function __construct($host)
    {
        $this->host = $host;
    }

    public function generate($path)
    {
        return $this->host.$path;
    }
}

class Controller
{
    public function myAction(Request $request)
    {
        // Instead of
        $page = isset($_GET['page']) ? intval($_GET['page']) : 1;

        // Better (assuming you use the Symfony2 request)
        $page = $request->query->get('page', 1);
    }
}
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    {
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        $query = $_GET;
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        // Remove parts from querystring that should not be part of filename
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        foreach ($clear as $value) {
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            unset($query[$value]);
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        }
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        arsort($query);
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        $queryAsString = http_build_query($query);
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        $this->filename = md5($queryAsString);
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        if (CIMAGE_DEBUG) {
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            $this->container["query-string"] = $queryAsString;
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        }
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        return $this->filename;
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    }
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    /**
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     * Add header items.
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     *
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     * @param string $header add this as header.
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     *
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     * @return $this
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     */
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    public function addHeader($header)
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    {
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        $this->container["header"][] = $header;
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        return $this;
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    }
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    /**
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     * Add header items on output, these are not output when 304.
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     *
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     * @param string $header add this as header.
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     *
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     * @return $this
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     */
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    public function addHeaderOnOutput($header)
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    {
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        $this->container["header-output"][] = $header;
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        return $this;
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    }
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    /**
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     * Set path to source image to.
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     *
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     * @param string $source path to source image file.
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     *
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     * @return $this
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     */
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    public function setSource($source)
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    {
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        $this->container["source"] = $source;
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        return $this;
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    }
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    /**
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     * Set last modified of source image, use to check for 304.
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     *
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     * @param string $lastModified
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     *
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     * @return $this
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     */
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    public function setLastModified($lastModified)
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    {
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        $this->container["last-modified"] = $lastModified;
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        return $this;
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    }
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    /**
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     * Get filename of cached item.
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     *
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     * @return string as filename.
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     */
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    public function getFilename()
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    {
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        return $this->path . "/" . $this->filename;
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    }
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    /**
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     * Write current item to cache.
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     *
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     * @return boolean if cache file was written.
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     */
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    public function writeToCache()
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    {
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        if (!$this->enabled) {
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            return false;
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        }
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        if (is_dir($this->path) && is_writable($this->path)) {
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            $filename = $this->getFilename();
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            return file_put_contents($filename, json_encode($this->container)) !== false;
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        }
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        return false;
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    }
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    /**
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     * Output current item from cache, if available.
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     *
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     * @return void
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     */
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    public function output()
0 ignored issues
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output uses the super-global variable $_SERVER which is generally not recommended.

Instead of super-globals, we recommend to explicitly inject the dependencies of your class. This makes your code less dependent on global state and it becomes generally more testable:

// Bad
class Router
{
    public function generate($path)
    {
        return $_SERVER['HOST'].$path;
    }
}

// Better
class Router
{
    private $host;

    public function __construct($host)
    {
        $this->host = $host;
    }

    public function generate($path)
    {
        return $this->host.$path;
    }
}

class Controller
{
    public function myAction(Request $request)
    {
        // Instead of
        $page = isset($_GET['page']) ? intval($_GET['page']) : 1;

        // Better (assuming you use the Symfony2 request)
        $page = $request->query->get('page', 1);
    }
}
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    {
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        $filename = $this->getFilename();
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        if (!is_readable($filename)) {
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            return;
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        }
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        $item = json_decode(file_get_contents($filename), true);
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        if (!is_readable($item["source"])) {
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            return;
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        }
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        foreach ($item["header"] as $value) {
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            header($value);
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        }
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        if (isset($_SERVER["HTTP_IF_MODIFIED_SINCE"])
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            && strtotime($_SERVER["HTTP_IF_MODIFIED_SINCE"]) == $item["last-modified"]) {
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            header("HTTP/1.0 304 Not Modified");
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            if (CIMAGE_DEBUG) {
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                trace(__CLASS__ . " 304");
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            }
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            exit;
0 ignored issues
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Coding Style Compatibility introduced by
The method output() contains an exit expression.

An exit expression should only be used in rare cases. For example, if you write a short command line script.

In most cases however, using an exit expression makes the code untestable and often causes incompatibilities with other libraries. Thus, unless you are absolutely sure it is required here, we recommend to refactor your code to avoid its usage.

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        }
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        foreach ($item["header-output"] as $value) {
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            header($value);
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        }
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        if (CIMAGE_DEBUG) {
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            trace(__CLASS__ . " 200");
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        }
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        readfile($item["source"]);
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        exit;
0 ignored issues
show
Coding Style Compatibility introduced by
The method output() contains an exit expression.

An exit expression should only be used in rare cases. For example, if you write a short command line script.

In most cases however, using an exit expression makes the code untestable and often causes incompatibilities with other libraries. Thus, unless you are absolutely sure it is required here, we recommend to refactor your code to avoid its usage.

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    }
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}
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