note 126143 added to features.gc.collecting-cycles

在步骤 B 中，模拟删除每个紫色变量。模拟删除时可能将不是紫色的普通变量引用数减"1"，...... ----------------------------------------------------------- 文中对步骤B的描述，应该做些补充， 起初节点 zval 本身不做减 1 操作，但是如果节点 zval 中包含的符号表中有节点又指向了初始的 zval（环形引用），那么这个时候需要对节点 zval 进行减 1 操作； 参考文章：https://www.iminho.me/wiki/blog-18.html ---- Server IP: 45.112.84.4 Probable Submitter: 45.112.85.242 (proxied: 203.205.141.39) ---- Manual Page -- https://php.net/manual/en/features.gc.collecting-cycles.php Edit -- https://main.php.net/note/edit/126143 Del: integrated -- https://main.php.net/note/delete/126143/integrated Del: useless -- https://main.php.net/note/delete/126143/useless Del: bad code -- https://main.php.net/note/delete/126143/bad+code Del: spam -- https://main.php.net/note/delete/126143/spam Del: non-english -- https://main.php.net/note/delete/126143/non-english Del: in docs -- https://main.php.net/note/delete/126143/in+docs Del: other reasons-- https://main.php.net/note/delete/126143 Reject -- https://main.php.net/note/reject/126143 Search -- https://main.php.net/manage/user-notes.php