Symfony Profiler

Query Metrics

6 Database Queries

6 Different statements

3.02 ms Query time

0 Invalid entities

0 Managed entities

Grouped Statements

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Time▼

Count

Info

1.02 ms
(33.80%)

SELECT mc.clip_id, mc.film_id, mc.public_key, mc.thumb_path, mc.preview_path, mc.duration, mc.quality, mc.is_vertical, mc.likes, mc.dislikes, mc.views, mc.status, mc.published_at, f1.title as film_title, f1.original_title as film_original_title, f1.poster_path as film_poster_path, f1.release_year as film_release_year, IFNULL(r.title, f.title) as title FROM movie_clip mc LEFT JOIN movie_clip_translation f ON mc.clip_id = f.clip_id AND f.lang_id=? LEFT JOIN film f1 ON mc.film_id = f1.film_id LEFT JOIN movie_clip_translation r ON mc.clip_id = r.clip_id  AND r.lang_id=? WHERE mc.clip_id IN (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)

Parameters:

[
  1
  2
  b"\x01Ž·ÑO–r;Œ_¬Èó\x17‰Á"
  b"\x01Žã@+íp§¤²\vñ;s\x1F."
  b"\x01Žã?œJqi§\t\x0FÁßõ+\x19"
  b"\x01Žã>\x14ÄsÊ½ô"\x05+6\x1Aÿ"
  b"\x01Žã<öBp\x06‘{Åô-²\x03ª"
  b"\x01Ž·Ò\x03gs\x10¼wHéxh§Ô"
  b"\x01Ž·Ò\}r–¯$úk™#öt"
  b"\x01Ž·Ò¡\x02s,²ŒÇ\x00Ñii¦"
  b"\x01Ž·ÒÛ'sLœb`´‡µtP"
  b"\x01Ž¯«Ê\x16pë»• ³H¨h‹"
  b"\x01ŽÃ¬°Žrò«"¾ÿÆ>Ú"
  b"""
    \x01Ž±\n
    búq²…ã<ªÐÛVì
    """
  b"\x01ŽÎÀ ¯q;‹Þc\x04a\x14Œ"
  b"\x01Ž°Ú{ZqÑ˜u™ÚBiM"
  b"\x01Ž½ÑÑyq3¹à0ÉÓPY:"
  b"\x01Žã<‹r.’\tø\x1CDa;ÿ"
  b"\x01Ž´²íŸs:Œ;\x11j›Š;Z"
  b"\x01Ž°:ùûr¿“o)Š\x18\x16ì£"
  b"\x01Ž°_Œ-q.“Ëœz!•Žç"
  b"\x01ŽÄ\fßds‘¨Ð[Ñ€4ö"
  b"\x01Ž¯¿¸ÜsC‡ëI*“kLÙ"
  b"\x01Ž¯¶œsn¸e¤ÿ\x1E\v’\x7F"
  b"\x01Ž¯¶‹\x12p\x11¥ŽÖÆÉU¯ì"
  b"\x01Ž¯µ]\x12r‹£&Ö}¡cw\x1E"
]

View formatted query View runnable query Explain query View query backtrace

SELECT
  mc.clip_id,
  mc.film_id,
  mc.public_key,
  mc.thumb_path,
  mc.preview_path,
  mc.duration,
  mc.quality,
  mc.is_vertical,
  mc.likes,
  mc.dislikes,
  mc.views,
  mc.status,
  mc.published_at,
  f1.title as film_title,
  f1.original_title as film_original_title,
  f1.poster_path as film_poster_path,
  f1.release_year as film_release_year,
  IFNULL(r.title, f.title) as title
FROM
  movie_clip mc
  LEFT JOIN movie_clip_translation f ON mc.clip_id = f.clip_id
  AND f.lang_id = ?
  LEFT JOIN film f1 ON mc.film_id = f1.film_id
  LEFT JOIN movie_clip_translation r ON mc.clip_id = r.clip_id
  AND r.lang_id = ?
WHERE
  mc.clip_id IN (
    ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?,
    ?, ?, ?, ?, ?, ?, ?, ?
  )

SELECT mc.clip_id, mc.film_id, mc.public_key, mc.thumb_path, mc.preview_path, mc.duration, mc.quality, mc.is_vertical, mc.likes, mc.dislikes, mc.views, mc.status, mc.published_at, f1.title as film_title, f1.original_title as film_original_title, f1.poster_path as film_poster_path, f1.release_year as film_release_year, IFNULL(r.title, f.title) as title FROM movie_clip mc LEFT JOIN movie_clip_translation f ON mc.clip_id = f.clip_id AND f.lang_id=1 LEFT JOIN film f1 ON mc.film_id = f1.film_id LEFT JOIN movie_clip_translation r ON mc.clip_id = r.clip_id  AND r.lang_id=2 WHERE mc.clip_id IN (0x018EB7D14F96723B8C5FACC8F31789C1, 0x018EE3402BED70A7A4B20BF13B731F2E, 0x018EE33F9C4A7169A7090FC1DFF52B19, 0x018EE33E14C473CABDF422052B361AFF, 0x018EE33CF6427006917BC5F42DB203AA, 0x018EB7D203677310BC7748E97868A7D4, 0x018EB7D25C7D7296AF24FA6B9923F674, 0x018EB7D2A102732CB28CC700D16969A6, 0x018EB7D2DB27734C9C6260B487B57450, 0x018EAFABCA1670EBBB95A0B348A8688B, 0x018EC3ACB08E72F290AB22BEFFC63EDA, 0x018EB10A62FA71B285E33CAAD0DB56EC, 0x018ECEC020AF713B8BDE63900461148C, 0x018EB0DA7B5A71D198759099DA42694D, 0x018EBDD1D1797133B9E030C9D350593A, 0x018EE3813C8B722E9209F81C44613BFF, 0x018EB4B2ED9F733A8C3B116A9B8A3B5A, 0x018EB03AF9FB72BF936F298A1816ECA3, 0x018EB05F8C2D712E93CB9C7A21958DE7, 0x018EC40CDF64739181A8D05BD18034F6, 0x018EAFBFB8DC734387EB492A936B4CD9, 0x018EAFB69CAD736EB865A4FF1E0B927F, 0x018EAFB68B127011A58DD6C6C955AFEC, 0x018EAFB55D12728BA326D67DA163771E);

#	File/Call
1	Doctrine\DBAL\Query\QueryBuilder->executeQuery (line 323)
2	Doctrine\DBAL\Query\QueryBuilder->fetchAllAssociative (line 274)
3	App\MovieClip\Presentation\Fetcher\ByIds\Fetcher->fetch (line 39)
4	App\MovieClip\Presentation\Fetcher\RelatedFetcher->getByClipId (line 42)
5	App\MovieClip\Presentation\Controller\Public\Fragments\RelatedController->__invoke (line 31)
6	App\Infrastructure\EventSubscriber\ResponseCacheSubscriber->cache (line 52)
7	Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke (line 115)
8	Symfony\Component\EventDispatcher\EventDispatcher->callListeners (line 206)
9	Symfony\Component\EventDispatcher\EventDispatcher->dispatch (line 56)
10	Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch (line 122)
11	Symfony\Component\HttpKernel\HttpKernel->handleRaw (line 178)
12	Symfony\Component\HttpKernel\HttpKernel->handle (line 76)
13	Symfony\Component\HttpKernel\HttpCache\SubRequestHandler->handle (line 86)
14	Symfony\Component\HttpKernel\Fragment\InlineFragmentRenderer::render (line 75)
15	Symfony\Component\HttpKernel\Fragment\FragmentHandler->render (line 81)
16	Symfony\Component\HttpKernel\DependencyInjection\LazyLoadingFragmentHandler->render (line 46)
17	Symfony\Bridge\Twig\Extension\HttpKernelRuntime->renderFragment (line 41)
18	__TwigTemplate_a43ed99f55ef6bac452cd88cdadd6bf2->block_content (line 387)
19	Twig\Template->yieldBlock (line 446)
20	__TwigTemplate_be9c4b57101ee037ed3c0993ef0330a8->block_body (line 125)
21	Twig\Template->yieldBlock (line 446)
22	__TwigTemplate_65078dcfdfadcd7a8a61f978f732123d->doDisplay (line 119)
23	Twig\Template->yield (line 402)
24	__TwigTemplate_be9c4b57101ee037ed3c0993ef0330a8->doDisplay (line 56)
25	Twig\Template->yield (line 402)
26	__TwigTemplate_a43ed99f55ef6bac452cd88cdadd6bf2->doDisplay (line 60)
27	Twig\Template->yield (line 402)
28	Twig\Template->display (line 358)
29	Twig\Template->render (line 373)
30	Twig\TemplateWrapper->render (line 51)
31	Twig\Environment->render (line 333)
32	Symfony\Bundle\FrameworkBundle\Controller\AbstractController->doRenderView (line 431)
33	Symfony\Bundle\FrameworkBundle\Controller\AbstractController->doRender (line 436)
34	Symfony\Bundle\FrameworkBundle\Controller\AbstractController->render (line 250)
35	App\MovieClip\Presentation\Controller\Public\View\ActionController->__invoke (line 30)
36	App\Infrastructure\EventSubscriber\ResponseCacheSubscriber->cache (line 52)
37	Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke (line 115)
38	Symfony\Component\EventDispatcher\EventDispatcher->callListeners (line 206)
39	Symfony\Component\EventDispatcher\EventDispatcher->dispatch (line 56)
40	Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch (line 122)
41	Symfony\Component\HttpKernel\HttpKernel->handleRaw (line 178)
42	Symfony\Component\HttpKernel\HttpKernel->handle (line 76)
43	Symfony\Component\HttpKernel\Kernel->handle (line 182)
44	Symfony\Component\Runtime\Runner\Symfony\HttpKernelRunner->run (line 35)
45	require_once (line 29)
46	require_once (line 5)

0.60 ms
(19.99%)

SELECT mc.clip_id, mc.user_id, mc.film_id, mc.public_key, mc.thumb_path, mc.preview_path, mc.duration, mc.quality, mc.is_vertical, mc.likes, mc.dislikes, mc.views, mc.status, mc.published_at, u.username, IFNULL(r.title, f.title) as title, IFNULL(r.description, f.description) as description FROM movie_clip mc LEFT JOIN movie_clip_translation f ON mc.clip_id = f.clip_id AND f.lang_id=? LEFT JOIN user u ON mc.user_id = u.user_id LEFT JOIN movie_clip_translation r ON mc.clip_id = r.clip_id  AND r.lang_id=? WHERE mc.public_key = ? LIMIT 1

Parameters:

[
  1
  2
  "WmRBgwU"
]

View formatted query View runnable query Explain query View query backtrace

SELECT
  mc.clip_id,
  mc.user_id,
  mc.film_id,
  mc.public_key,
  mc.thumb_path,
  mc.preview_path,
  mc.duration,
  mc.quality,
  mc.is_vertical,
  mc.likes,
  mc.dislikes,
  mc.views,
  mc.status,
  mc.published_at,
  u.username,
  IFNULL(r.title, f.title) as title,
  IFNULL(r.description, f.description) as description
FROM
  movie_clip mc
  LEFT JOIN movie_clip_translation f ON mc.clip_id = f.clip_id
  AND f.lang_id = ?
  LEFT JOIN user u ON mc.user_id = u.user_id
  LEFT JOIN movie_clip_translation r ON mc.clip_id = r.clip_id
  AND r.lang_id = ?
WHERE
  mc.public_key = ?
LIMIT
  1

SELECT mc.clip_id, mc.user_id, mc.film_id, mc.public_key, mc.thumb_path, mc.preview_path, mc.duration, mc.quality, mc.is_vertical, mc.likes, mc.dislikes, mc.views, mc.status, mc.published_at, u.username, IFNULL(r.title, f.title) as title, IFNULL(r.description, f.description) as description FROM movie_clip mc LEFT JOIN movie_clip_translation f ON mc.clip_id = f.clip_id AND f.lang_id=1 LEFT JOIN user u ON mc.user_id = u.user_id LEFT JOIN movie_clip_translation r ON mc.clip_id = r.clip_id  AND r.lang_id=2 WHERE mc.public_key = 'WmRBgwU' LIMIT 1;

#	File/Call
1	Doctrine\DBAL\Query\QueryBuilder->executeQuery (line 323)
2	App\MovieClip\Presentation\Fetcher\ViewMovieFetcher->fetchByPublicKey (line 42)
3	App\MovieClip\Presentation\Controller\Public\View\ActionController->__invoke (line 24)
4	App\Infrastructure\EventSubscriber\ResponseCacheSubscriber->cache (line 52)
5	Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke (line 115)
6	Symfony\Component\EventDispatcher\EventDispatcher->callListeners (line 206)
7	Symfony\Component\EventDispatcher\EventDispatcher->dispatch (line 56)
8	Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch (line 122)
9	Symfony\Component\HttpKernel\HttpKernel->handleRaw (line 178)
10	Symfony\Component\HttpKernel\HttpKernel->handle (line 76)
11	Symfony\Component\HttpKernel\Kernel->handle (line 182)
12	Symfony\Component\Runtime\Runner\Symfony\HttpKernelRunner->run (line 35)
13	require_once (line 29)
14	require_once (line 5)

0.57 ms
(18.93%)

SELECT `mchr`.`related_id`
                FROM `movie_clip_has_related` as `mchr`
                LEFT JOIN `movie_clip` as `mc` USING (`clip_id`)
                WHERE `mchr`.`clip_id` = ? AND `mc`.`status` = ?
                ORDER BY `mchr`.`relevance` DESC
                LIMIT ?
                OFFSET ?

Parameters:

[
  b"\x01Ž·Ñ¶Îqˆ‰\x1EšòÁ}\x10ü"
  10
  24
  0
]

View formatted query View runnable query Explain query View query backtrace

SELECT
  `mchr`.`related_id`
FROM
  `movie_clip_has_related` as `mchr`
  LEFT JOIN `movie_clip` as `mc` USING (`clip_id`)
WHERE
  `mchr`.`clip_id` = ?
  AND `mc`.`status` = ?
ORDER BY
  `mchr`.`relevance` DESC
LIMIT
  ?
OFFSET
  ?

SELECT `mchr`.`related_id`
                FROM `movie_clip_has_related` as `mchr`
                LEFT JOIN `movie_clip` as `mc` USING (`clip_id`)
                WHERE `mchr`.`clip_id` = 0x018EB7D1B6CE7188891E9AF2C17D10FC AND `mc`.`status` = 10
                ORDER BY `mchr`.`relevance` DESC
                LIMIT 24
                OFFSET 0
            ;

#	File/Call
1	App\MovieClip\Presentation\Fetcher\RelatedFetcher->getCurrentRelationIds (line 53)
2	App\MovieClip\Presentation\Fetcher\RelatedFetcher->getByClipId (line 32)
3	App\MovieClip\Presentation\Controller\Public\Fragments\RelatedController->__invoke (line 31)
4	App\Infrastructure\EventSubscriber\ResponseCacheSubscriber->cache (line 52)
5	Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke (line 115)
6	Symfony\Component\EventDispatcher\EventDispatcher->callListeners (line 206)
7	Symfony\Component\EventDispatcher\EventDispatcher->dispatch (line 56)
8	Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch (line 122)
9	Symfony\Component\HttpKernel\HttpKernel->handleRaw (line 178)
10	Symfony\Component\HttpKernel\HttpKernel->handle (line 76)
11	Symfony\Component\HttpKernel\HttpCache\SubRequestHandler->handle (line 86)
12	Symfony\Component\HttpKernel\Fragment\InlineFragmentRenderer::render (line 75)
13	Symfony\Component\HttpKernel\Fragment\FragmentHandler->render (line 81)
14	Symfony\Component\HttpKernel\DependencyInjection\LazyLoadingFragmentHandler->render (line 46)
15	Symfony\Bridge\Twig\Extension\HttpKernelRuntime->renderFragment (line 41)
16	__TwigTemplate_a43ed99f55ef6bac452cd88cdadd6bf2->block_content (line 387)
17	Twig\Template->yieldBlock (line 446)
18	__TwigTemplate_be9c4b57101ee037ed3c0993ef0330a8->block_body (line 125)
19	Twig\Template->yieldBlock (line 446)
20	__TwigTemplate_65078dcfdfadcd7a8a61f978f732123d->doDisplay (line 119)
21	Twig\Template->yield (line 402)
22	__TwigTemplate_be9c4b57101ee037ed3c0993ef0330a8->doDisplay (line 56)
23	Twig\Template->yield (line 402)
24	__TwigTemplate_a43ed99f55ef6bac452cd88cdadd6bf2->doDisplay (line 60)
25	Twig\Template->yield (line 402)
26	Twig\Template->display (line 358)
27	Twig\Template->render (line 373)
28	Twig\TemplateWrapper->render (line 51)
29	Twig\Environment->render (line 333)
30	Symfony\Bundle\FrameworkBundle\Controller\AbstractController->doRenderView (line 431)
31	Symfony\Bundle\FrameworkBundle\Controller\AbstractController->doRender (line 436)
32	Symfony\Bundle\FrameworkBundle\Controller\AbstractController->render (line 250)
33	App\MovieClip\Presentation\Controller\Public\View\ActionController->__invoke (line 30)
34	App\Infrastructure\EventSubscriber\ResponseCacheSubscriber->cache (line 52)
35	Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke (line 115)
36	Symfony\Component\EventDispatcher\EventDispatcher->callListeners (line 206)
37	Symfony\Component\EventDispatcher\EventDispatcher->dispatch (line 56)
38	Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch (line 122)
39	Symfony\Component\HttpKernel\HttpKernel->handleRaw (line 178)
40	Symfony\Component\HttpKernel\HttpKernel->handle (line 76)
41	Symfony\Component\HttpKernel\Kernel->handle (line 182)
42	Symfony\Component\Runtime\Runner\Symfony\HttpKernelRunner->run (line 35)
43	require_once (line 29)
44	require_once (line 5)

0.33 ms
(11.06%)

SELECT `path` FROM `movie_clip_media` WHERE `clip_id` = ?

Parameters:

[
  b"\x01Ž·Ñ¶Îqˆ‰\x1EšòÁ}\x10ü"
]

View formatted query View runnable query Explain query View query backtrace

SELECT
  `path`
FROM
  `movie_clip_media`
WHERE
  `clip_id` = ?

SELECT `path` FROM `movie_clip_media` WHERE `clip_id` = 0x018EB7D1B6CE7188891E9AF2C17D10FC;

#	File/Call
1	App\MovieClip\Presentation\Fetcher\ViewMovieFetcher->fetchMedia (line 152)
2	App\MovieClip\Presentation\Fetcher\ViewMovieFetcher->fetchByPublicKey (line 50)
3	App\MovieClip\Presentation\Controller\Public\View\ActionController->__invoke (line 24)
4	App\Infrastructure\EventSubscriber\ResponseCacheSubscriber->cache (line 52)
5	Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke (line 115)
6	Symfony\Component\EventDispatcher\EventDispatcher->callListeners (line 206)
7	Symfony\Component\EventDispatcher\EventDispatcher->dispatch (line 56)
8	Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch (line 122)
9	Symfony\Component\HttpKernel\HttpKernel->handleRaw (line 178)
10	Symfony\Component\HttpKernel\HttpKernel->handle (line 76)
11	Symfony\Component\HttpKernel\Kernel->handle (line 182)
12	Symfony\Component\Runtime\Runner\Symfony\HttpKernelRunner->run (line 35)
13	require_once (line 29)
14	require_once (line 5)

0.25 ms
(8.21%)

SELECT `lang_id`, `code`, `name`, `icon` FROM `lang`

Parameters:

[]

View formatted query View runnable query Explain query View query backtrace

SELECT
  `lang_id`,
  `code`,
  `name`,
  `icon`
FROM
  `lang`

SELECT `lang_id`, `code`, `name`, `icon` FROM `lang`;

#	File/Call
1	App\Language\Model\LanguageResolver->init (line 34)
2	App\Language\Model\LanguageResolver->__construct (line 25)
3	ContainerNbSs4vH\App_KernelDevDebugContainer->getLanguageResolverService (line 1116)
4	ContainerNbSs4vH\getActionController16Service::do (line 25)
5	ContainerNbSs4vH\App_KernelDevDebugContainer::load (line 568)
6	Symfony\Component\DependencyInjection\Container->make (line 221)
7	Symfony\Component\DependencyInjection\Container::get (line 203)
8	Symfony\Component\HttpKernel\Controller\ContainerControllerResolver->instantiateController (line 38)
9	Symfony\Bundle\FrameworkBundle\Controller\ControllerResolver->instantiateController (line 25)
10	Symfony\Component\HttpKernel\Controller\ControllerResolver->createController (line 115)
11	Symfony\Component\HttpKernel\Controller\ControllerResolver->getController (line 95)
12	Symfony\Component\HttpKernel\Controller\TraceableControllerResolver->getController (line 33)
13	Symfony\Component\HttpKernel\HttpKernel->handleRaw (line 166)
14	Symfony\Component\HttpKernel\HttpKernel->handle (line 76)
15	Symfony\Component\HttpKernel\Kernel->handle (line 182)
16	Symfony\Component\Runtime\Runner\Symfony\HttpKernelRunner->run (line 35)
17	require_once (line 29)
18	require_once (line 5)

0.24 ms
(8.01%)

SELECT film_id,
           original_title,
           title,
           poster_path,
           release_year
    FROM `film`
    WHERE `film_id` = ?

Parameters:

[
  b"\x01–\x05\x0F¼èrW©2Á\x19>{ÎÉ"
]

View formatted query View runnable query Explain query View query backtrace

SELECT
  film_id,
  original_title,
  title,
  poster_path,
  release_year
FROM
  `film`
WHERE
  `film_id` = ?

SELECT film_id,
           original_title,
           title,
           poster_path,
           release_year
    FROM `film`
    WHERE `film_id` = 0x0196050FBCE87257A932C1193E7BCEC9;

#	File/Call
1	App\MovieClip\Presentation\Fetcher\ViewMovieFetcher->fetchFilm (line 178)
2	App\MovieClip\Presentation\Fetcher\ViewMovieFetcher->fetchByPublicKey (line 56)
3	App\MovieClip\Presentation\Controller\Public\View\ActionController->__invoke (line 24)
4	App\Infrastructure\EventSubscriber\ResponseCacheSubscriber->cache (line 52)
5	Symfony\Component\EventDispatcher\Debug\WrappedListener->__invoke (line 115)
6	Symfony\Component\EventDispatcher\EventDispatcher->callListeners (line 206)
7	Symfony\Component\EventDispatcher\EventDispatcher->dispatch (line 56)
8	Symfony\Component\EventDispatcher\Debug\TraceableEventDispatcher->dispatch (line 122)
9	Symfony\Component\HttpKernel\HttpKernel->handleRaw (line 178)
10	Symfony\Component\HttpKernel\HttpKernel->handle (line 76)
11	Symfony\Component\HttpKernel\Kernel->handle (line 182)
12	Symfony\Component\Runtime\Runner\Symfony\HttpKernelRunner->run (line 35)
13	require_once (line 29)
14	require_once (line 5)

Database Connections

Name	Service
default	doctrine.dbal.default_connection

Entity Managers

Name	Service
default	doctrine.orm.default_entity_manager

Second Level Cache

Second Level Cache is not enabled.

Managed Entities

default entity manager

Class	Amount of managed objects

Entities Mapping

No loaded entities.

Symfony Profiler

GET https://dev.muviki.cc/_fragment?_path=_format%3Dhtml%26_locale%3Dru%26_controller%3DApp%255CMovieClip%255CPresentation%255CController%255CPublic%255CFragments%2…

Configuration Settings

Theme

Page Width

Query Metrics

Grouped Statements

Database Connections

Entity Managers

Second Level Cache

Managed Entities

default entity manager

Entities Mapping