| 1 | <?php |
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| 11 | trait HasModules |
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| 12 | { |
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| 13 | /** |
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| 14 | * The study modules that belongs to the model. |
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| 15 | */ |
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| 16 | public function modules() |
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| 20 | |||
| 21 | /** |
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| 22 | * Add a module to modules. |
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| 23 | * |
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| 24 | * @param Module $module |
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| 25 | */ |
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| 26 | public function addModule($module) |
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| 30 | |||
| 31 | /** |
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| 32 | * Add a module by id to modules. |
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| 33 | * |
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| 34 | * @param Module $module |
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| 35 | */ |
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| 36 | public function addModuleById($module) |
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| 40 | } |
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| 41 |
This check looks for methods that are used by a trait but not required by it.
To illustrate, let’s look at the following code example
The trait
Idableprovides a methodequalsIdthat in turn relies on the methodgetId(). If this method does not exist on a class mixing in this trait, the method will fail.Adding the
getId()as an abstract method to the trait will make sure it is available.