PHP study notes--the use of traits (generated to achieve multiple inheritance)

trait is a new feature of php5.4 that is created to achieve multiple inheritance.
The method of use is as follows:

<?phptrait Tool{functiongetName(){echo"tool name";
    }
}classHammerTool{useTool}

$tempTool = newHammerTool();$tempTool->getName();//输出:tool name

The priority is that the subclass overrides the trait, and the trait overrides the parent class inherited by the subclass.
If you use several traits and there are the same methods in the traits, you can use the insteadof or as method to replace or rename them.
For example:

<?phptrait A{functionsmallTalk(){echo"A smallTalk";
    }functionbigTalk(){echo"A bigTalk";
    }
}trait B{functionsmallTalk(){echo"B smallTalk";
    }functionbigTalk(){echo"B bigTalk";
    }functionmiddleTalk(){echo"B middleTalk";
    }
}classTalker {useA, B {B::smallTalkinsteadofA;//用B的smallTalk替换A的方法。A::bigTalk insteadof B;
        B::middleTalk asprivate myPrivateHello;//重命名为B}
}

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