php heredoc和phpwind的模板技术使用方法小结
在PHP的文档中,只是提到了echo可以使用如下命令输出多行字符串(而且其中的变量被自动替换):
PHP代码
复制代码 代码如下:
echo This uses the "here document" syntax to output
multiple lines with $variable interpolation. Note
that the here document terminator must appear on a
line with just a semicolon. no extra whitespace!
END;
上面的END结束符可以自己规定,在Phpwind,使用了“EOT”来结束。但是需要注意的是,这个END必须是在一行的开头才能有效,这其实是Heredoc技术的一个局限性(因为heredoc可以自定义结束符,所以引入了这个问题),在下面会提到。
phpwind的模板文件一般存放在templatewind目录下面,在BBS目录中,使用require语句包含这个模板文件。其实这个模板文件是作为对应的PHP文件的一部分执行的,所以就不需要像PHPLib Template那样需要进行模板解析,然后再执行的过程。
为了让heredoc的内容能被DreamWeaver这样的编辑器正确识别,以实现“所见即所得的”的网页设计,需要在heredoc中增加注释,示例文件如下:
PHP代码
复制代码 代码如下:
Hello,$name!
这样的模板文件,其实就是一个标准的,可以执行的PHP文件。但是,这样的PHP文件,其HTML样式在DreamWeaver中可以正确的显示出来,所有的PHP代码会被看做HTML注释,而且在输出的时候,不会输出出来。比如,上面的文件在DreamWeaver中,被显示成:
PHP代码
复制代码 代码如下:
Hello,$name!
这样,在设计页面的时候,我们就可以借助DW的可视化界面,进行一些界面的修改,美化等工作。尽管没有实现完全的代码和HTML的分离,但至少提供了一种辅助性的设计手段。

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