Analysis of static static properties and static method examples of php

<?php
/*
 * static
 */
 /*Static: belongs to a class and not to a single object (global, shared by all objects)
  * Static properties: When calling static properties within a class's method, do not use the $this-> method, but use the self:: method.
  * Static method:
  * Can be called when the class does not have any object.
  *It's okay to use it as an ordinary method
  *The normal method cannot be called in static methods
  *
  * */
 class xin {
  static private $name;
  public function setname($namec) {
    self::$name = $namec;
  }
  public function getname() {
    return self::$name;
  }
  static public function name($namecc) {
    echo "I am $namecc";
  }
 }
 $xind = new xin();
 $xind-&gt;setname("Site <br/>");
 echo $xind-&gt;getname();
 $oldd = new xin();
 $oldd-&gt;setname("Government <br/>");
 echo $oldd-&gt;getname();
 echo $xind-&gt;getname();
 echo xin::name("Star");
 echo "&lt;br/&gt;";
?&gt;