报错Parse error: syntax error, unexpected T_STRING in F:appwampserverAppServwwwnamespace.php on line 3
<code> <?php namespace Article; const PATH = '/article'; function getCommentTotal() { return 100; } class Comment { } namespace MessageBoard; const PATH = '/message_board'; function getCommentTotal() { return 300; } class Comment { } //调用当前空间的常量、函数和类 echo PATH; ///message_board echo getCommentTotal(); //300 $comment = new Comment(); //调用Article空间的常量、函数和类 echo \Article\PATH; ///article echo \Article\getCommentTotal(); //100 $article_comment = new \Article\Comment(); ?> </code>
报错Parse error: syntax error, unexpected T_STRING in F:appwampserverAppServwwwnamespace.php on line 3
<code> <?php namespace Article; const PATH = '/article'; function getCommentTotal() { return 100; } class Comment { } namespace MessageBoard; const PATH = '/message_board'; function getCommentTotal() { return 300; } class Comment { } //调用当前空间的常量、函数和类 echo PATH; ///message_board echo getCommentTotal(); //300 $comment = new Comment(); //调用Article空间的常量、函数和类 echo \Article\PATH; ///article echo \Article\getCommentTotal(); //100 $article_comment = new \Article\Comment(); ?> </code>
const 关键字只能用于定义类内常量,类外请使用 define。(PHP 5.3 之前)