php配置文件解析 深未来

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;;;;;;;;;;;
; WARNING ;
;;;;;;;;;;;
; This is the default settings file for new PHPinstallations.
; By default, PHP installs itself with a configuration suitablefor
; development purposes, and *NOT* for production purposes.
; For several security-oriented considerations that should betaken
; before going online with your site, please consultphp.ini-recommended
; and http://php.net/manual/en/security.php.
;;;;;;;;;;;;;;;;;;;
; About php.ini   ;
;;;;;;;;;;;;;;;;;;;
; This file controls many aspects of PHP'sbehavior.  In order for PHP to
; read it, it must be named 'php.ini'.  PHP looksfor it in the current
; working directory, in the path designated by the environmentvariable
; PHPRC, and in the path that was defined in compile time (in thatorder).
; Under Windows, the compile-time path is the Windowsdirectory.  The
; path in which the php.ini file is looked for can be overriddenusing
; the -c argument in command line mode.
;
; The syntax of the file is extremely simple. Whitespace and Lines
; beginning with a semicolon are silently ignored (as you probablyguessed).
; Section headers (e.g. [Foo]) are also silently ignored, eventhough
; they might mean something in the future.
;
; Directives are specified using the following syntax:
; directive = value
; Directive names are *case sensitive* - foo=bar is different fromFOO=bar.
;
; The value can be a string, a number, a PHP constant (e.g. E_ALLor M_PI), one
; of the INI constants (On, Off, True, False, Yes, No and None) oran expression
; (e.g. E_ALL & ~E_NOTICE), or a quoted string("foo").
;在ini文件本身使用的逻辑值使用的运算符
; Expressions in the INI file are limited to bitwise operators andparentheses:
;|       bitwise OR
;&       bitwise AND
;~       bitwise NOT
;!       boolean NOT
;
; Boolean fla