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PHP中的定界符EOF

Jun 06, 2016 pm 07:42 PM
eof php web programming language

PHP是一个Web编程语言,在编程过程中难免会遇到用echo来输出大段的html和javascript脚本的情况,如果用传统的输出方法 ——按字符串输出的话,肯定要有大量的转义符来对字符串中的引号等特殊字符进行转义,以免出现语法错误。如果是一两处还可以容忍,但是要

 PHP是一个Web编程语言,在编程过程中难免会遇到用echo来输出大段的html和javascript脚本的情况,如果用传统的输出方法 ——按字符串输出的话,肯定要有大量的转义符来对字符串中的引号等特殊字符进行转义,以免出现语法错误。如果是一两处还可以容忍,但是要是一个完整的 html文本或者是一个200行的js我想是谁都会崩溃的。这就是PHP为什么要引入一个定界符的原因——至少一大部分原因是这样的。


1.PHP定界符的作用就是按照原样,包括换行格式什么的,输出在其内部的东西;
2.在PHP定界符中的任何特殊字符都不需要转义;
3.PHP定界符中的PHP变量会被正常的用其值来替换。

PHP中的定界符格式是这样的:

……
Eof;

 

报错的原因:

不仅EOF;前边不能有空格,而且echo

$v=  time(); 
  echo  

  • 框架面板{$v} 
        ..........
    Eof;
    ?>

  • 感谢原作者的分享。

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