diff --git a/composer.json b/composer.json
index e3bef379af0335483c87e0e4d62e988ca199d412..1bf994954bf70fc5620dec1fb2b6ce69c4c50354 100644
--- a/composer.json
+++ b/composer.json
@@ -123,6 +123,7 @@
"webmozart/assert": "^1.11.0"
},
"suggest": {
+ "ext-apcu": "Needed when non-default APCU based cache backends are used",
"ext-gd": "GDlib/Freetype is required for building images with text (GIFBUILDER) and can also be used to scale images",
"ext-fileinfo": "Used for proper file type detection in the file abstraction layer",
"ext-zlib": "TYPO3 uses zlib for amongst others output compression and un/packing t3x extension files",
diff --git a/typo3/sysext/core/Classes/Cache/Backend/ApcuBackend.php b/typo3/sysext/core/Classes/Cache/Backend/ApcuBackend.php
index a9a8b36ad37bb68925da166234d45c60b0cc7423..04a91243c8d59b7fc09cd225ff048796ea62a05a 100644
--- a/typo3/sysext/core/Classes/Cache/Backend/ApcuBackend.php
+++ b/typo3/sysext/core/Classes/Cache/Backend/ApcuBackend.php
@@ -16,58 +16,37 @@
namespace TYPO3\CMS\Core\Cache\Backend;
use TYPO3\CMS\Core\Cache\Exception;
-use TYPO3\CMS\Core\Cache\Exception\InvalidDataException;
use TYPO3\CMS\Core\Cache\Frontend\FrontendInterface;
use TYPO3\CMS\Core\Core\Environment;
/**
* A caching backend which stores cache entries by using APCu.
*
+ * The APCu backend is not very good with tagging and scales O(2n) with the
+ * number of tags. Do not use this backend if the data to be cached has many tags!
+ *
* This backend uses the following types of keys:
* - tag_xxx
- * xxx is tag name, value is array of associated identifiers identifier. This
- * is "forward" tag index. It is mainly used for obtaining content by tag
- * (get identifier by tag -> get content by identifier)
+ * xxx is tag name, value is array of associated identifiers identifier. This
+ * is "forward" tag index. It is mainly used for obtaining content by tag
+ * (get identifier by tag -> get content by identifier)
* - ident_xxx
- * xxx is identifier, value is array of associated tags. This is "reverse" tag
- * index. It provides quick access for all tags associated with this identifier
- * and used when removing the identifier
+ * xxx is identifier, value is array of associated tags. This is "reverse" tag
+ * index. It provides quick access for all tags associated with this identifier
+ * and used when removing the identifier
*
- * Each key is prepended with a prefix. By default prefix consists from two parts
+ * Each key is prepended with a prefix. The prefix makes sure keys from the different
+ * installations do not conflict. By default, prefix consists from two parts
* separated by underscore character and ends in yet another underscore character:
* - "TYPO3"
- * - MD5 of path to TYPO3 and user running TYPO3
- * This prefix makes sure that keys from the different installations do not
- * conflict.
+ * - Hash of path to TYPO3 and user running TYPO3
*/
-class ApcuBackend extends AbstractBackend implements TaggableBackendInterface
+final class ApcuBackend extends AbstractBackend implements TaggableBackendInterface, TransientBackendInterface
{
/**
- * A prefix to separate stored data from other data possible stored in the APC
- *
- * @var string
+ * A prefix to separate stored data from other data possible stored in the APC.
*/
- protected $identifierPrefix;
-
- /**
- * Set the cache identifier prefix.
- *
- * @param string $identifierPrefix
- */
- protected function setIdentifierPrefix($identifierPrefix)
- {
- $this->identifierPrefix = $identifierPrefix;
- }
-
- /**
- * Retrieves the cache identifier prefix.
- *
- * @return string
- */
- protected function getIdentifierPrefix()
- {
- return $this->identifierPrefix;
- }
+ private string $identifierPrefix = '';
/**
* Constructs this backend
@@ -90,34 +69,29 @@ class ApcuBackend extends AbstractBackend implements TaggableBackendInterface
/**
* Initializes the identifier prefix when setting the cache.
*/
- public function setCache(FrontendInterface $cache)
+ public function setCache(FrontendInterface $cache): void
{
parent::setCache($cache);
- $pathHash = md5(Environment::getProjectPath() . $this->context . $cache->getIdentifier());
- $this->setIdentifierPrefix('TYPO3_' . $pathHash);
+ $this->identifierPrefix = 'TYPO3_' . hash('xxh3', Environment::getProjectPath() . $this->context . $cache->getIdentifier()) . '_';
}
/**
* Saves data in the cache.
*
* @param string $entryIdentifier An identifier for this specific cache entry
- * @param string $data The data to be stored
+ * @param mixed $data The data to be stored
* @param array $tags Tags to associate with this cache entry
* @param int $lifetime Lifetime of this cache entry in seconds. If NULL is specified, the default lifetime is used. "0" means unlimited lifetime.
* @throws Exception if no cache frontend has been set.
- * @throws InvalidDataException if $data is not a string
*/
- public function set($entryIdentifier, $data, array $tags = [], $lifetime = null)
+ public function set($entryIdentifier, $data, array $tags = [], $lifetime = null): void
{
if (!$this->cache instanceof FrontendInterface) {
throw new Exception('No cache frontend has been set yet via setCache().', 1232986118);
}
- if (!is_string($data)) {
- throw new InvalidDataException('The specified data is of type "' . gettype($data) . '" but a string is expected.', 1232986125);
- }
$tags[] = '%APCBE%' . $this->cacheIdentifier;
$expiration = $lifetime ?? $this->defaultLifetime;
- $success = apcu_store($this->getIdentifierPrefix() . $entryIdentifier, $data, $expiration);
+ $success = apcu_store($this->identifierPrefix . $entryIdentifier, $data, $expiration);
if ($success === true) {
$this->removeIdentifierFromAllTags($entryIdentifier);
$this->addIdentifierToTags($entryIdentifier, $tags);
@@ -132,10 +106,10 @@ class ApcuBackend extends AbstractBackend implements TaggableBackendInterface
* @param string $entryIdentifier An identifier which describes the cache entry to load
* @return mixed The cache entry's content as a string or FALSE if the cache entry could not be loaded
*/
- public function get($entryIdentifier)
+ public function get($entryIdentifier): mixed
{
$success = false;
- $value = apcu_fetch($this->getIdentifierPrefix() . $entryIdentifier, $success);
+ $value = apcu_fetch($this->identifierPrefix . $entryIdentifier, $success);
return $success ? $value : $success;
}
@@ -145,10 +119,10 @@ class ApcuBackend extends AbstractBackend implements TaggableBackendInterface
* @param string $entryIdentifier An identifier specifying the cache entry
* @return bool TRUE if such an entry exists, FALSE if not
*/
- public function has($entryIdentifier)
+ public function has($entryIdentifier): bool
{
$success = false;
- apcu_fetch($this->getIdentifierPrefix() . $entryIdentifier, $success);
+ apcu_fetch($this->identifierPrefix . $entryIdentifier, $success);
return $success;
}
@@ -160,10 +134,10 @@ class ApcuBackend extends AbstractBackend implements TaggableBackendInterface
* @param string $entryIdentifier Specifies the cache entry to remove
* @return bool TRUE if (at least) an entry could be removed or FALSE if no entry was found
*/
- public function remove($entryIdentifier)
+ public function remove($entryIdentifier): bool
{
$this->removeIdentifierFromAllTags($entryIdentifier);
- return apcu_delete($this->getIdentifierPrefix() . $entryIdentifier);
+ return apcu_delete($this->identifierPrefix . $entryIdentifier);
}
/**
@@ -173,36 +147,22 @@ class ApcuBackend extends AbstractBackend implements TaggableBackendInterface
* @param string $tag The tag to search for
* @return array An array with identifiers of all matching entries. An empty array if no entries matched
*/
- public function findIdentifiersByTag($tag)
+ public function findIdentifiersByTag($tag): array
{
$success = false;
- $identifiers = apcu_fetch($this->getIdentifierPrefix() . 'tag_' . $tag, $success);
+ $identifiers = apcu_fetch($this->identifierPrefix . 'tag_' . $tag, $success);
if ($success === false) {
return [];
}
return (array)$identifiers;
}
- /**
- * Finds all tags for the given identifier. This function uses reverse tag
- * index to search for tags.
- *
- * @param string $identifier Identifier to find tags by
- * @return array Array with tags
- */
- protected function findTagsByIdentifier($identifier)
- {
- $success = false;
- $tags = apcu_fetch($this->getIdentifierPrefix() . 'ident_' . $identifier, $success);
- return $success ? (array)$tags : [];
- }
-
/**
* Removes all cache entries of this cache.
*
* @throws Exception
*/
- public function flush()
+ public function flush(): void
{
if (!$this->cache instanceof FrontendInterface) {
throw new Exception('Yet no cache frontend has been set via setCache().', 1232986571);
@@ -215,7 +175,7 @@ class ApcuBackend extends AbstractBackend implements TaggableBackendInterface
*
* @param string $tag The tag the entries must have
*/
- public function flushByTag($tag)
+ public function flushByTag($tag): void
{
$identifiers = $this->findIdentifiersByTag($tag);
foreach ($identifiers as $identifier) {
@@ -225,10 +185,8 @@ class ApcuBackend extends AbstractBackend implements TaggableBackendInterface
/**
* Associates the identifier with the given tags
- *
- * @param string $entryIdentifier
*/
- protected function addIdentifierToTags($entryIdentifier, array $tags)
+ private function addIdentifierToTags(string $entryIdentifier, array $tags): void
{
// Get identifier-to-tag index to look for updates
$existingTags = $this->findTagsByIdentifier($entryIdentifier);
@@ -239,7 +197,7 @@ class ApcuBackend extends AbstractBackend implements TaggableBackendInterface
$identifiers = $this->findIdentifiersByTag($tag);
if (!in_array($entryIdentifier, $identifiers, true)) {
$identifiers[] = $entryIdentifier;
- apcu_store($this->getIdentifierPrefix() . 'tag_' . $tag, $identifiers);
+ apcu_store($this->identifierPrefix . 'tag_' . $tag, $identifiers);
}
// Test if identifier-to-tag index needs update
if (!in_array($tag, $existingTags, true)) {
@@ -250,16 +208,14 @@ class ApcuBackend extends AbstractBackend implements TaggableBackendInterface
// Update identifier-to-tag index if needed
if ($existingTagsUpdated) {
- apcu_store($this->getIdentifierPrefix() . 'ident_' . $entryIdentifier, $existingTags);
+ apcu_store($this->identifierPrefix . 'ident_' . $entryIdentifier, $existingTags);
}
}
/**
* Removes association of the identifier with the given tags
- *
- * @param string $entryIdentifier
*/
- protected function removeIdentifierFromAllTags($entryIdentifier)
+ private function removeIdentifierFromAllTags(string $entryIdentifier): void
{
// Get tags for this identifier
$tags = $this->findTagsByIdentifier($entryIdentifier);
@@ -274,20 +230,29 @@ class ApcuBackend extends AbstractBackend implements TaggableBackendInterface
if (($key = array_search($entryIdentifier, $identifiers)) !== false) {
unset($identifiers[$key]);
if (!empty($identifiers)) {
- apcu_store($this->getIdentifierPrefix() . 'tag_' . $tag, $identifiers);
+ apcu_store($this->identifierPrefix . 'tag_' . $tag, $identifiers);
} else {
- apcu_delete($this->getIdentifierPrefix() . 'tag_' . $tag);
+ apcu_delete($this->identifierPrefix . 'tag_' . $tag);
}
}
}
// Clear reverse tag index for this identifier
- apcu_delete($this->getIdentifierPrefix() . 'ident_' . $entryIdentifier);
+ apcu_delete($this->identifierPrefix . 'ident_' . $entryIdentifier);
}
/**
- * Does nothing, as APCu does GC itself
+ * Finds all tags for the given identifier. This function uses reverse tag
+ * index to search for tags.
*/
- public function collectGarbage()
+ private function findTagsByIdentifier(string $identifier): array
+ {
+ $success = false;
+ $tags = apcu_fetch($this->identifierPrefix . 'ident_' . $identifier, $success);
+ return $success ? (array)$tags : [];
+ }
+
+ public function collectGarbage(): void
{
+ // Noop, APCu has internal GC
}
}
diff --git a/typo3/sysext/core/Tests/Unit/Cache/Backend/ApcuBackendTest.php b/typo3/sysext/core/Tests/Functional/Cache/Backend/ApcuBackendTest.php
similarity index 71%
rename from typo3/sysext/core/Tests/Unit/Cache/Backend/ApcuBackendTest.php
rename to typo3/sysext/core/Tests/Functional/Cache/Backend/ApcuBackendTest.php
index 7dfe77af01e69a70bbc18d1501dff128a73f6b60..543d830eb4d51afc1185606578cce38547abd553 100644
--- a/typo3/sysext/core/Tests/Unit/Cache/Backend/ApcuBackendTest.php
+++ b/typo3/sysext/core/Tests/Functional/Cache/Backend/ApcuBackendTest.php
@@ -15,33 +15,38 @@ declare(strict_types=1);
* The TYPO3 project - inspiring people to share!
*/
-namespace TYPO3\CMS\Core\Tests\Unit\Cache\Backend;
+namespace TYPO3\CMS\Core\Tests\Functional\Cache\Backend;
use TYPO3\CMS\Core\Cache\Backend\ApcuBackend;
use TYPO3\CMS\Core\Cache\Exception;
use TYPO3\CMS\Core\Cache\Frontend\FrontendInterface;
use TYPO3\CMS\Core\Utility\StringUtility;
-use TYPO3\TestingFramework\Core\AccessibleObjectInterface;
-use TYPO3\TestingFramework\Core\Unit\UnitTestCase;
+use TYPO3\TestingFramework\Core\Functional\FunctionalTestCase;
/**
* NOTE: If you want to execute these tests you need to enable apc in
* cli context (apc.enable_cli = 1) and disable slam defense (apc.slam_defense = 0)
*/
-class ApcuBackendTest extends UnitTestCase
+class ApcuBackendTest extends FunctionalTestCase
{
- protected bool $resetSingletonInstances = true;
+ protected bool $initializeDatabase = false;
protected function setUp(): void
{
- parent::setUp();
// APCu module is called apcu, but options are prefixed with apc
if (!extension_loaded('apcu') || !(bool)ini_get('apc.enabled') || !(bool)ini_get('apc.enable_cli')) {
self::markTestSkipped('APCu extension was not available, or it was disabled for CLI.');
}
- if ((bool)ini_get('apc.slam_defense')) {
+ if (ini_get('apc.slam_defense')) {
self::markTestSkipped('This testcase can only be executed with apc.slam_defense = 0');
}
+ parent::setUp();
+ }
+
+ protected function tearDown(): void
+ {
+ apcu_clear_cache();
+ parent::tearDown();
}
/**
@@ -62,24 +67,51 @@ class ApcuBackendTest extends UnitTestCase
*/
public function itIsPossibleToSetAndCheckExistenceInCache(): void
{
- $backend = $this->setUpBackend();
+ $backend = new ApcuBackend('Testing');
+ $backend->setCache($this->createMock(FrontendInterface::class));
$data = 'Some data';
$identifier = StringUtility::getUniqueId('MyIdentifier');
$backend->set($identifier, $data);
self::assertTrue($backend->has($identifier));
}
+ public function itIsPossibleToSetAndGetEntryDataProvider(): iterable
+ {
+ yield [ 5 ];
+ yield [ 5.23 ];
+ yield [ 'foo' ];
+ yield [ false ];
+ yield [ true ];
+ yield [ null ];
+ yield [ ['foo', 'bar'] ];
+ }
+
/**
* @test
+ * @dataProvider itIsPossibleToSetAndGetEntryDataProvider
*/
- public function itIsPossibleToSetAndGetEntry(): void
+ public function itIsPossibleToSetAndGetEntry(mixed $data): void
{
- $backend = $this->setUpBackend();
- $data = 'Some data';
+ $backend = new ApcuBackend('Testing');
+ $backend->setCache($this->createMock(FrontendInterface::class));
$identifier = StringUtility::getUniqueId('MyIdentifier');
$backend->set($identifier, $data);
+ self::assertSame($data, $backend->get($identifier));
+ }
+
+ /**
+ * @test
+ */
+ public function itIsPossibleToSetAndGetObject(): void
+ {
+ $backend = new ApcuBackend('Testing');
+ $backend->setCache($this->createMock(FrontendInterface::class));
+ $identifier = StringUtility::getUniqueId('MyIdentifier');
+ $object = new \stdClass();
+ $object->foo = 'foo';
+ $backend->set($identifier, $object);
$fetchedData = $backend->get($identifier);
- self::assertEquals($data, $fetchedData);
+ self::assertEquals($object, $fetchedData);
}
/**
@@ -87,7 +119,8 @@ class ApcuBackendTest extends UnitTestCase
*/
public function itIsPossibleToRemoveEntryFromCache(): void
{
- $backend = $this->setUpBackend();
+ $backend = new ApcuBackend('Testing');
+ $backend->setCache($this->createMock(FrontendInterface::class));
$data = 'Some data';
$identifier = StringUtility::getUniqueId('MyIdentifier');
$backend->set($identifier, $data);
@@ -100,7 +133,8 @@ class ApcuBackendTest extends UnitTestCase
*/
public function itIsPossibleToOverwriteAnEntryInTheCache(): void
{
- $backend = $this->setUpBackend();
+ $backend = new ApcuBackend('Testing');
+ $backend->setCache($this->createMock(FrontendInterface::class));
$data = 'Some data';
$identifier = StringUtility::getUniqueId('MyIdentifier');
$backend->set($identifier, $data);
@@ -115,7 +149,8 @@ class ApcuBackendTest extends UnitTestCase
*/
public function findIdentifiersByTagFindsSetEntries(): void
{
- $backend = $this->setUpBackend();
+ $backend = new ApcuBackend('Testing');
+ $backend->setCache($this->createMock(FrontendInterface::class));
$data = 'Some data';
$identifier = StringUtility::getUniqueId('MyIdentifier');
$backend->set($identifier, $data, ['UnitTestTag%tag1', 'UnitTestTag%tag2']);
@@ -130,7 +165,8 @@ class ApcuBackendTest extends UnitTestCase
*/
public function setRemovesTagsFromPreviousSet(): void
{
- $backend = $this->setUpBackend();
+ $backend = new ApcuBackend('Testing');
+ $backend->setCache($this->createMock(FrontendInterface::class));
$data = 'Some data';
$identifier = StringUtility::getUniqueId('MyIdentifier');
$backend->set($identifier, $data, ['UnitTestTag%tag1', 'UnitTestTag%tagX']);
@@ -144,7 +180,8 @@ class ApcuBackendTest extends UnitTestCase
*/
public function hasReturnsFalseIfTheEntryDoesNotExist(): void
{
- $backend = $this->setUpBackend();
+ $backend = new ApcuBackend('Testing');
+ $backend->setCache($this->createMock(FrontendInterface::class));
$identifier = StringUtility::getUniqueId('NonExistingIdentifier');
self::assertFalse($backend->has($identifier));
}
@@ -154,7 +191,8 @@ class ApcuBackendTest extends UnitTestCase
*/
public function removeReturnsFalseIfTheEntryDoesntExist(): void
{
- $backend = $this->setUpBackend();
+ $backend = new ApcuBackend('Testing');
+ $backend->setCache($this->createMock(FrontendInterface::class));
$identifier = StringUtility::getUniqueId('NonExistingIdentifier');
self::assertFalse($backend->remove($identifier));
}
@@ -164,7 +202,8 @@ class ApcuBackendTest extends UnitTestCase
*/
public function flushByTagRemovesCacheEntriesWithSpecifiedTag(): void
{
- $backend = $this->setUpBackend();
+ $backend = new ApcuBackend('Testing');
+ $backend->setCache($this->createMock(FrontendInterface::class));
$data = 'some data' . microtime();
$backend->set('BackendAPCUTest1', $data, ['UnitTestTag%test', 'UnitTestTag%boring']);
$backend->set('BackendAPCUTest2', $data, ['UnitTestTag%test', 'UnitTestTag%special']);
@@ -180,7 +219,8 @@ class ApcuBackendTest extends UnitTestCase
*/
public function flushByTagsRemovesCacheEntriesWithSpecifiedTags(): void
{
- $backend = $this->setUpBackend();
+ $backend = new ApcuBackend('Testing');
+ $backend->setCache($this->createMock(FrontendInterface::class));
$data = 'some data' . microtime();
$backend->set('BackendAPCUTest1', $data, ['UnitTestTag%test', 'UnitTestTag%boring']);
$backend->set('BackendAPCUTest2', $data, ['UnitTestTag%test', 'UnitTestTag%special']);
@@ -196,7 +236,8 @@ class ApcuBackendTest extends UnitTestCase
*/
public function flushRemovesAllCacheEntries(): void
{
- $backend = $this->setUpBackend();
+ $backend = new ApcuBackend('Testing');
+ $backend->setCache($this->createMock(FrontendInterface::class));
$data = 'some data' . microtime();
$backend->set('BackendAPCUTest1', $data);
$backend->set('BackendAPCUTest2', $data);
@@ -235,7 +276,8 @@ class ApcuBackendTest extends UnitTestCase
*/
public function largeDataIsStored(): void
{
- $backend = $this->setUpBackend();
+ $backend = new ApcuBackend('Testing');
+ $backend->setCache($this->createMock(FrontendInterface::class));
$data = str_repeat('abcde', 1024 * 1024);
$identifier = StringUtility::getUniqueId('tooLargeData');
$backend->set($identifier, $data);
@@ -251,35 +293,13 @@ class ApcuBackendTest extends UnitTestCase
$identifier = StringUtility::getUniqueId('MyIdentifier');
$tags = ['UnitTestTag%test', 'UnitTestTag%boring'];
- $backend = $this->setUpBackend(true);
- $backend->_call('addIdentifierToTags', $identifier, $tags);
- self::assertSame(
- $tags,
- $backend->_call('findTagsByIdentifier', $identifier)
- );
-
- $backend->_call('addIdentifierToTags', $identifier, $tags);
- self::assertSame(
- $tags,
- $backend->_call('findTagsByIdentifier', $identifier)
- );
- }
+ $backend = new ApcuBackend('Testing');
+ $backend->setCache($this->createMock(FrontendInterface::class));
+ $backend->set($identifier, 'testData', $tags);
+ $backend->set($identifier, 'testData', $tags);
- /**
- * Sets up the APCu backend used for testing
- *
- * @param bool $accessible TRUE if backend should be encapsulated in accessible proxy otherwise FALSE.
- * @return AccessibleObjectInterface|ApcuBackend
- */
- protected function setUpBackend(bool $accessible = false)
- {
- $cache = $this->createMock(FrontendInterface::class);
- if ($accessible) {
- $backend = $this->getAccessibleMock(ApcuBackend::class, null, ['Testing']);
- } else {
- $backend = new ApcuBackend('Testing');
- }
- $backend->setCache($cache);
- return $backend;
+ // Expect exactly 5 entries:
+ // 1 for data, 3 for tag->identifier, 1 for identifier->tags
+ self::assertSame(5, count(apcu_cache_info()['cache_list']));
}
}
diff --git a/typo3/sysext/core/Tests/Functional/Cache/Backend/RedisBackendTest.php b/typo3/sysext/core/Tests/Functional/Cache/Backend/RedisBackendTest.php
index 16bbd7fd65aaf769f1746e5acd0323e8e182c839..f0dc7af6731623d29f635ce97576bb2d80278a01 100644
--- a/typo3/sysext/core/Tests/Functional/Cache/Backend/RedisBackendTest.php
+++ b/typo3/sysext/core/Tests/Functional/Cache/Backend/RedisBackendTest.php
@@ -42,10 +42,9 @@ class RedisBackendTest extends FunctionalTestCase
if (!getenv('typo3TestingRedisHost')) {
self::markTestSkipped('environment variable "typo3TestingRedisHost" must be set to run this test');
}
- // Note we assume that if that typo3TestingRedisHost env is set, we can use that for testing,
+ // Note we assume that if typo3TestingRedisHost env is set, we can use that for testing,
// there is no test to see if the daemon is actually up and running. Tests will fail if env
// is set but daemon is down.
-
parent::setUp();
}
diff --git a/typo3/sysext/core/composer.json b/typo3/sysext/core/composer.json
index 46110237765dfc46e404e36b8f28b6a6aba13db4..6127790262e751c5dcfea1e156c1c7729b42f72b 100644
--- a/typo3/sysext/core/composer.json
+++ b/typo3/sysext/core/composer.json
@@ -76,6 +76,7 @@
"typo3fluid/fluid": "^2.7.2"
},
"suggest": {
+ "ext-apcu": "Needed when non-default APCU based cache backends are used",
"ext-fileinfo": "Used for proper file type detection in the file abstraction layer",
"ext-gd": "GDlib/Freetype is required for building images with text (GIFBUILDER) and can also be used to scale images",
"ext-mysqli": "",