PHP函式大全 先搞出大類，再慢慢折騰
1 I. Apache 函式館
2 II. 數組函式館
3 III. aspell functions [deprecated]
4 IV. BCMath Arbitrary Precision Mathematics Functions
5 V. Bzip2 Compression Functions
6 VI. Calendar Functions
7 VII. CCVS API Functions [deprecated]
8 VIII. Windows 的 COM 支持函式館
9 IX. 類／對象函式館
10 X. ClibPDF Functions
11 XI. Crack Functions
12 XII. CURL, Client URL Library Functions
13 XIII. Cybercash Payment Functions
14 XIV. Cyrus IMAP administration Functions
15 XV. Character Type Functions
16 XVI. database (dbm-style) Abstraction Layer Functions
17 XVII. 時間日期函式館
18 XVIII. dBase Functions
19 XIX. DBM Functions [deprecated]
20 XX. dbx Functions
