贴一个关于define()原型和用法给LZ吧,是英文哦
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Description
bool define ( string name, mixed value [, bool case_insensitive])
Defines a named constant. See the section on constants for more details.
The name of the constant is given by name; the value is given by value.
The optional third parameter case_insensitive is also available. If the value TRUE is given, then the constant will be defined case-insensitive. The default behaviour is case-sensitive; i.e. CONSTANT and Constant represent different values.
例子 1. Defining Constants
<?php
define("CONSTANT", "Hello world.");
echo CONSTANT; // outputs "Hello world."
echo Constant; // outputs "Constant" and issues a notice.
define("GREETING", "Hello you.", true);
echo GREETING; // outputs "Hello you."
echo Greeting; // outputs "Hello you."
?>
如果成功则返回 TRUE,失败则返回 FALSE。