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Allow writing to readonly properties during cloning #9403
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,74 @@ | ||
| --TEST-- | ||
| clone can write to readonly properties | ||
| --FILE-- | ||
| <?php | ||
|
|
||
| class Counter | ||
| { | ||
| private static int $counter = 0; | ||
|
|
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| public readonly int $count; | ||
| private readonly int $foo; | ||
|
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| public function __construct() | ||
| { | ||
| $this->count = ++self::$counter; | ||
| $this->foo = 0; | ||
| } | ||
|
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| public function count(?int $count = null): static | ||
| { | ||
| $new = clone $this; | ||
| $new->count = $count ?? ++self::$counter; | ||
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| return $new; | ||
| } | ||
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| public function __clone() | ||
| { | ||
| if (is_a(debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 2)[1]['class'] ?? '', self::class, true)) { | ||
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|
||
| unset($this->count); | ||
| } else { | ||
| $this->count = ++self::$counter; | ||
| } | ||
| $this->foo = 1; | ||
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|
||
| } | ||
| } | ||
|
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| $a = new Counter(); | ||
| var_dump($a); | ||
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| var_dump(clone $a); | ||
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| $b = $a->count(); | ||
| var_dump($b); | ||
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| $c = $a->count(123); | ||
| var_dump($c); | ||
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| ?> | ||
| --EXPECTF-- | ||
| object(Counter)#%d (2) { | ||
| ["count"]=> | ||
| int(1) | ||
| ["foo":"Counter":private]=> | ||
| int(0) | ||
| } | ||
| object(Counter)#%d (2) { | ||
| ["count"]=> | ||
| int(2) | ||
| ["foo":"Counter":private]=> | ||
| int(1) | ||
| } | ||
| object(Counter)#%d (2) { | ||
| ["count"]=> | ||
| int(3) | ||
| ["foo":"Counter":private]=> | ||
| int(1) | ||
| } | ||
| object(Counter)#%d (2) { | ||
| ["count"]=> | ||
| int(123) | ||
| ["foo":"Counter":private]=> | ||
| int(1) | ||
| } | ||
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