回答編集履歴
1
見直し
test
CHANGED
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@@ -17,3 +17,9 @@
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}
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```
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+
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参考：
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[inheritance - Changing method signature for implementing classes in PHP - Software Engineering Stack Exchange](https://softwareengineering.stackexchange.com/questions/227766/changing-method-signature-for-implementing-classes-in-php)
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