本文實(shí)例講述了PHP實(shí)現(xiàn)一個(gè)限制實(shí)例化次數(shù)的類。分享給大家供大家參考，具體如下：

實(shí)現(xiàn)思路

實(shí)現(xiàn)代碼

<?phpclass demo{  public $name;  public static $count=0;  private function __construct($name){    echo "create $name <br/>";    $this->name = $name;    self::$count++;  }  public function __destruct(){    echo "destory ".$this->name."<br/>";    self::$count--;  }  public static function create($name){    if(self::$count>2){      die("you can only create at most 2 objects.");    }else{      return new self($name);    }  }}$one = demo::create("one");$two = demo::create("two");$two = null;$three = demo::create("three");

運(yùn)行結(jié)果：

create one
create two
destory two
create three
destory three
destory one

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希望本文所述對(duì)大家PHP程序設(shè)計(jì)有所幫助。