(PHP 5, PHP 7, PHP 8)
ReflectionClass::isInstantiable — 检查类是否可实例化
检查这个类是否可实例化。
此函数没有参数。
成功时返回 true， 或者在失败时返回 false。
示例 #1 ReflectionClass::isInstantiable() 例子
<?php
class C { }
interface iface {
function f1();
}
class ifaceImpl implements iface {
function f1() {}
}
abstract class abstractClass {
function f1() { }
abstract function f2();
}
class D extends abstractClass {
function f2() { }
}
trait T {
function f1() {}
}
class privateConstructor {
private function __construct() { }
}
$classes = array(
"C",
"iface",
"ifaceImpl",
"abstractClass",
"D",
"T",
"privateConstructor",
);
foreach($classes as $class ) {
$reflectionClass = new ReflectionClass($class);
echo "Is $class instantiable? ";
var_dump($reflectionClass->isInstantiable());
}
?>
以上例程会输出：
Is C instantiable? bool(true) Is iface instantiable? bool(false) Is ifaceImpl instantiable? bool(true) Is abstractClass instantiable? bool(false) Is D instantiable? bool(true) Is T instantiable? bool(false) Is privateConstructor instantiable? bool(false)