Design Patter by PHP[5]: Singleton

第五回目は Singleton です。コードは毎回 Subversion のレポジトリ

にあります。

Singleton は結構思考訓練になった気がする。Class があって、Instance があって、Nested な構造をうまく紐解く感じ。
綴りミスとか言う下らないことで少し詰まった。。
- 怪我の功名じゃないけれど、綴りミスで気がついたこと。PHP ってインスタンスに対して自由にメンバ変数を設定できる。参照: addmember.php
- Method の追加はどうやってもできなさそう。
- function 型は String に cast されて代入される。だから create_function の値は lambda_1 とかいう値に。
- アクセス修飾子は設定できないだろうなぁ。というか試してすらいないし、やり方も思いつかん。
Triple の結果を確かめるのに、serialize を使ってみた。Serialize で帰ってくる string の仕様については Yahoo Developer Network: Using Serialized PHP with Yahoo! Web Servicesを参照。

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