PHP OOP性能:参数还是实例变量? [英] PHP OOP Performance : Parameter or Instance Variable?

问题描述

我很想获得OOP问题的答案，但到目前为止找不到任何信息.

Im curious about getting an answer for a OOP question but can't find any info so far.

在这里，编写类和方法是为每个方法传递参数或使用实例/字段变量和$ this-> x更快；

Here goes, writing classes and methods is it faster to pass in parameters for each method or use instance/field variables and $this->x;

在运行时哪个会更快?

class ExampleByParameter(){

 function SomeMethod($a,$b){
 echo $a." ".$b;
 return;
 }

}

或

class ExampleByInstance(){

 function __construct($a,$b){
 $this->a=$a;
 $this->b=$b;
 }

 function SomeMehtod(){
 $a=$this->a;
 $b=$this->b;
 echo $a." ".$b;
 return;
 }

}

我想他们与上面的示例没有什么区别，但是我认为使用更复杂的代码可能会有很大的区别.

I would imagine their would be no difference with the examples above but im thinking there might be a significant difference with more complicated code.

推荐答案

性能差异将可忽略不计.您应该真正确定哪种模式最适合您的类结构.

The performance differece is going to be negligible. You should really be deciding which pattern is best for your class structure.

您的课程是否依赖于$a和$b才能正常运行?将它们放在构造函数中.

Does your class depend on $a and $b to operate properly? Put them in the constructor.

SomeMethod是公开的吗?除了返回值以外，它对提供的变量是否有任何作用?如果是这样，请将其保留为参数.

Is SomeMethod public? Does it do anything with the supplied variables beyond what it returns? If so, keep them as parameters.

在大型项目中，准确的类设计与可忽略的性能改进相比，您将获得更多的好处.

In a large-scale project, you will gain more benefit from accurate class design vs negligible performance improvements.

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