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51 lines
1.1 KiB
51 lines
1.1 KiB
--TEST--
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array reference assignment to element: $arr[$k] = &$v writes back through reference
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--FILE--
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<?php
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class RefSource
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{
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public $value = 30;
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public static $staticValue = 40;
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}
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function main()
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{
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$x = 10;
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$y = 20;
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$arr = [1, 2, 3];
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$arr[0] = &$x; // 覆盖已有元素为引用
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$arr[5] = &$y; // 新建元素为引用
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$x = 100;
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$y = 200;
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var_dump($arr[0], $arr[5]); // 100, 200
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// 通过元素引用写回
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$arr[0] = 111;
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$arr[5] = 222;
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var_dump($x, $y); // 111, 222
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// 嵌套：引用赋值到多维数组元素
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$z = 7;
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$m = [[1], [2]];
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$m[0][0] = &$z;
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$z = 77;
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var_dump($m[0][0]); // 77
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// 左侧数组追加/元素写入不可因右侧是属性引用而被重新按读取解析
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$source = new RefSource();
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$propertyRefs = [];
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$propertyRefs[] = &$source->value;
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$propertyRefs[2] = &RefSource::$staticValue;
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$propertyRefs[0] = 333;
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$propertyRefs[2] = 444;
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var_dump($source->value, RefSource::$staticValue);
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}
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?>
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--EXPECT--
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int(100)
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int(200)
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int(111)
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int(222)
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int(77)
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int(333)
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int(444)
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