It seems the interface names are actually listed in a defined order:
- "extends" takes precedence over "implements" (i.e. first will be interfaces from (implemented in) the parent class (if any), then interfaces implemented in the class itself)
- when multiple interfaces are implemented at one time/level, it can be:
+ from an "implements" : they're listed in the defined order
+ from an "extends" (a class extends another class which implements multiple interfaces; or an interface extends multiple interfaces) : they're listed in REVERSE order
<?php
interface Foo {}
interface Bar {}
interface Other {}
interface Foobar extends Foo, Bar {}
interface Barfoo extends Bar, Foo {}
class Test1 implements Foo, Bar {}
class Test2 implements Bar, Foo {}
class Test3 extends Test1 {}
class Test4 extends Test2 {}
class Test5 extends Test1 implements Other {}
class Test6 implements Foobar, Other {}
class TestO implements Other {}
class Test7 extends TestO implements Barfoo {}
$r=new ReflectionClass('Test1');
print_r($r->getInterfaceNames()); // Foo, Bar
$r=new ReflectionClass('Test2');
print_r($r->getInterfaceNames()); // Bar, Foo
$r=new ReflectionClass('Test3');
print_r($r->getInterfaceNames()); // Bar, Foo
$r=new ReflectionClass('Test4');
print_r($r->getInterfaceNames()); // Foo, Bar
$r=new ReflectionClass('Test5');
print_r($r->getInterfaceNames()); // Bar, Foo, Other
$r=new ReflectionClass('Test6');
print_r($r->getInterfaceNames()); // Foobar, Bar, Foo, Other
$r=new ReflectionClass('Test7');
print_r($r->getInterfaceNames()); // Other, Barfoo, Foo, Bar
?>
ReflectionClass::getInterfaceNames
(PHP 5 >= 5.2.0, PHP 7, PHP 8)
ReflectionClass::getInterfaceNames — 获取接口（interface）名称
参数
此函数没有参数。
返回值
一个数值数组，接口（interface）的名称是数组的值。
示例
示例 #1 ReflectionClass::getInterfaceNames() 示例
<?php
interface Foo { }
interface Bar { }
class Baz implements Foo, Bar { }
$rc1 = new ReflectionClass("Baz");
print_r($rc1->getInterfaceNames());
?>以上示例的输出类似于：
Array
(
[0] => Foo
[1] => Bar
)
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13 years ago
