clubdeuce /
wplib-olm-google-maps
Duplicate code is one of the most pungent code smells. A rule that is often used is to re-structure code once it is duplicated in three or more places.
Common duplication problems, and corresponding solutions are:
| 1 | <?php |
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| 13 | View Code Duplication | class Map_Model extends Model_Base { |
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| 14 | |||
| 15 | /** |
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| 16 | * @var Map |
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| 17 | */ |
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| 18 | protected $_map; |
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| 19 | |||
| 20 | /** |
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| 21 | * @return bool |
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| 22 | */ |
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| 23 | 2 | function has_map() { |
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| 28 | |||
| 29 | /** |
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| 30 | * @param string $method_name |
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| 31 | * @param array $args |
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| 32 | * |
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| 33 | * @return mixed |
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| 34 | */ |
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| 35 | 2 | function __call( $method_name, $args = array() ) { |
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| 56 | } |
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| 57 |
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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: