and let’s assume the following content of Bar.php:
// Bar.phpnamespaceOtherDir;useSomeDir\Foo;// This now conflicts the class OtherDir\Foo
If both files OtherDir/Foo.php and SomeDir/Foo.php are loaded in the
same runtime, you will see a PHP error such as the following:
PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.php
However, as OtherDir/Foo.php does not necessarily have to be loaded and the
error is only triggered if it is loaded before OtherDir/Bar.php, this problem
might go unnoticed for a while. In order to prevent this error from surfacing,
you must import the namespace with a different alias:
// Bar.phpnamespaceOtherDir;useSomeDir\FooasSomeDirFoo;// There is no conflict anymore.
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use Cdb\Reader;
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use Cdb\Writer;
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/**
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* LCStore implementation which stores data as a collection of CDB files in the
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* directory given by $wgCacheDirectory. If $wgCacheDirectory is not set, this
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* will throw an exception.
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*
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* Profiling indicates that on Linux, this implementation outperforms MySQL if
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* the directory is on a local filesystem and there is ample kernel cache
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* space. The performance advantage is greater when the DBA extension is
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* available than it is with the PHP port.
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*
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* See Cdb.php and http://cr.yp.to/cdb.html
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*/
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class LCStoreCDB implements LCStore {
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/** @var Reader[] */
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private $readers;
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/** @var Writer */
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private $writer;
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/** @var string Current language code */
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private $currentLang;
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/** @var bool|string Cache directory. False if not set */
wikimedia /
mediawiki
addshore
Sam Reed
Let’s assume that you have a directory layout like this:
. |-- OtherDir | |-- Bar.php | `-- Foo.php `-- SomeDir `-- Foo.phpand let’s assume the following content of
Bar.php:If both files
OtherDir/Foo.phpandSomeDir/Foo.phpare loaded in the same runtime, you will see a PHP error such as the following:PHP Fatal error: Cannot use SomeDir\Foo as Foo because the name is already in use in OtherDir/Foo.phpHowever, as
OtherDir/Foo.phpdoes not necessarily have to be loaded and the error is only triggered if it is loaded beforeOtherDir/Bar.php, this problem might go unnoticed for a while. In order to prevent this error from surfacing, you must import the namespace with a different alias: