private static $_instance;
private function __construct()
{
}
private static function get_instance()
{
if(!isset(self::$_instance)){
self::$_instance = new self();
}else{
return self::$_instance;
}
}
//阻止clone
private function __clone()
{
trigger_error('Clone is not allow', E_USER_ERROR);
}
function test()
{
echo "test";
}
}
$test = man::get_instance();
$test->test();
?>
phpinfo();
exit;
abstract class Human
{
public abstract function talk();
public abstract function eat();
public abstract function walk();
public function calcMath($a, $b)
{
echo $a * $b;
}
}
class man extends Human
{
public function talk()
{
echo "Keep talking";
}
public function eat()
{
echo "Keep eating";
}
public function walk()
{
echo "Keep walking";
}
}
//$obj = new Character(); //Fatal error: Cannot instantiate abstract class
$user = new man();
$user->talk();
$user->calcMath(5, 3);
{
$this->bars[] = new bar($where);
}
function getName()
{
return $this->name;
}
}
class bar extends man
{
public $name;
function bar($w)
{
$this->name = $w;
}
function getName()
{
return $this->name;
}
function whosdrunk()
{
$who = get_parent_class($this);
if ($who == NULL) {
return 'nobody';
}
return eval("return " . $who . '::getName();');
}
}
$x = new man();
$x->getdrunk('The old Tavern');
var_dump($x->bars[0]->whosdrunk());
public $iq = 100;
public function say()
{
$arr = array('早上好', '晚上好', 'shit');
if ($this->iq >= 100) {
echo $arr[0];
} else {
$rad = rand(0, 2);
echo $arr[$rad];
}
}
}
class car
{
public function hit($m)
{
$ra = rand(50, 150);
$m->iq = $ra;
}
}
$m = new man();
$c = new car();
echo $m->say();
echo "<br>";
$c->hit($m);
echo $m->iq;
echo "<br>";
echo $m->say();
echo "<br>";
echo $m->say();
echo "<br>";
