romm /
formz
| 1 | <?php |
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| 19 | class PageExistsValidator extends AbstractValidator |
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| 20 | { |
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| 21 | const MESSAGE_DEFAULT = 'default'; |
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| 22 | |||
| 23 | /** |
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| 24 | * @inheritdoc |
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| 25 | */ |
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| 26 | protected $supportedMessages = [ |
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| 27 | self::MESSAGE_DEFAULT => [ |
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| 28 | 'key' => 'validator.page_exists.error', |
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| 29 | 'extension' => null |
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| 30 | ] |
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| 31 | ]; |
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| 32 | |||
| 33 | /** |
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| 34 | * @inheritdoc |
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| 35 | */ |
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| 36 | public function isValid($uid) |
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| 54 | } |
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| 55 |
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: