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HomeBackend DevelopmentPHP ProblemHow to solve php html tag conversion problem

php html标签转换问题的解决办法:1、使用“htmlentities()”函数将html标签转换成特殊字符;2、使用“html_entity_decode()”函数将htmlentities函数转义过的字符串转成html标签。

How to solve php html tag conversion problem

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 很多朋友在写php的时候,难免会遇到需要将html标签进行转义存储。比如存入数据库、xml文件等。而存储进去后,读取出来则需要转换成html输出。网上有许多人编写的转换函数,很长很难懂。其实php早就自带有这样的函数。大可不必自己编写。

下面分别介绍这两个函数。

1.htmlentities()函数:

说明:将html标签转换成特殊字符。例如将<script>转换成"<script>"</script>

例子:

[PHP] view plaincopy

  1. // An imaginary article submission from a bad user  
  2. //  it will redirect anyone to example.com if the code is run in a browser  
  3. $userInput = "I am going to hax0r your site, hahaha!  
  4.     <script> </script>
  5.     window.location = 'http://www.example.com/'  
  6.     '";  
  7.       
  8. //Lets make it safer before we use it  
  9. $userInputEntities = htmlentities($userInput);  
  10.   
  11. //Now we can display it  
  12. echo $userInputEntities;  

由于最近csdn的控件比较垃圾,请将上面的$apos改成单引号。---呼!

上面的语句执行后,将生成下面的结果

[HTML] view plaincopy

  1. I am going to hax0r your site, hahaha!  
  2.     script type='text/javascript'>  
  3.     window.location = 'http://www.88web.org/'  
  4.     script>'  

2.html_entity_decode()函数

说明:将htmlentities()函数转义过的字符串转成html标签。

例子:

[PHP] view plaincopy

  1. $orig = "I'll /"walk/" the dog now";  
  2.   
  3. $a = htmlentities($orig);  
  4.   
  5. $b = html_entity_decode($a);  
  6.   
  7. echo $a// I will "walk" the dog now  
  8.   
  9. echo $b// I will "walk" the dog now  
  10.  

转载自页面     http://www.cankaojishu.com/bcyy/82144.html

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