哪个更好foo :: bar（）VS $ foo :: bar（）？

问题描述：

About this:

class foo {
    public static function bar() {
        echo 'hi';
    }
}

What's difference between this:

foo::bar();

and this:

$obj = new foo();
$obj::bar();

Or not difference? Are both the right and the principles? Which is better?

关于此： p>

  class foo {
 public static  function bar（）{
 echo'hi'; 
} 
} 
  code>  pre> 
 
 这有什么区别： p> 
 
 
  foo :: bar（）; 
  code>  pre> 
 
 以及： p> 
 
 
  $ obj = new foo  （）; 
 $ obj :: bar（）; 
  code>  pre> 
 
 还是没有区别？ 是正确的还是原则？ 哪个更好？ p> 
  div>

答

I believe that there is no difference between them, but from my experience most often used form is Foo::bar().

You can find some examples here.

There is static method example with usage:

<?php

  class Foo {
     public static function aStaticMethod() {
      // ...
     }
  }

  Foo::aStaticMethod();
  $classname = 'Foo';
  $classname::aStaticMethod(); // As of PHP 5.3.0

?>

After that you can find example with accessing properties:

print Foo::$my_static . "
";

$foo = new Foo();
print $foo::$my_static . "
";

It means that both ways are correct. It's up to you what to use.

哪个更好foo :: bar（）VS $ foo :: bar（）？

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