php – MySQL Brackets？

我已经看到很多 PHP / MysqL问题在{}中包含了sql值,例如：

SELECT * FROM table WHERE field LIKE '{$value}';

那是怎么回事？它甚至有效吗？为什么这么多人会使用这种奇怪的(至少对我而言)语法？

解决方法

从 php.net开始：

Complex (curly) Syntax

This isn’t called complex because the
Syntax is complex,but because it
allows for the use of complex
expressions.

In fact,any value in the namespace can be included in a string with this Syntax. Simply write the expression the same way as it would appear outside the string,and then wrap it in { and }. Since { can not be escaped,this Syntax will only be recognised when the $immediately follows the {. Use {\$to get a literal {$.