php函数之htmlspecialchars(),htmlentities()等
在web编辑器往数据库写文章内容,或读取数据库内容时,经常会出现不解析的问题,出现一大堆代码,这其实是html实体和相应的字符串转换的问题。
主要涉及到htmlspecialchars(),htmlentities()、htmlspecialchars_decode() 这几个函数。
htmlspecialchars() 函数把一些预定义的字符转换为 HTML 实体。
预定义的字符是:
& (和号) 成为 &
" (双引号) 成为 "
' (单引号) 成为 '
PHP htmlentities() 函数
定义和用法
htmlentities() 函数把字符转换为 HTML 实体。
语法
htmlentities(string,quotestyle,character-set)
这里要注意这二者的区别
PHP htmlspecialchars_decode() 函数
定义和用法
htmlspecialchars_decode() 函数把一些预定义的 HTML 实体转换为字符。
会被解码的 HTML 实体是:
& 成为 & (和号)
" 成为 " (双引号)
' 成为 ' (单引号)
< 成为 < (小于)
> 成为 > (大于)

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