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43 lines
763 B
43 lines
763 B
--TEST--
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abstract method with reference parameter across multiple levels of inheritance
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--FILE--
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<?php
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namespace {
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abstract class Base
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{
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abstract public function abc(&$value);
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public function run()
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{
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// $value 在调用前未定义，按引用传给抽象方法后由最终实现类赋值
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$this->abc($value);
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var_dump($value);
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}
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}
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// 中间类继续继承抽象方法，不实现
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abstract class Mid extends Base
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{
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}
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class Test extends Mid
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{
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public function abc(&$value)
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{
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$value = [1, 2];
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}
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}
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function main()
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{
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(new Test)->run();
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}
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}
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?>
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--EXPECT--
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array(2) {
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[0]=>
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int(1)
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[1]=>
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int(2)
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}
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