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php中htmlspecialchars,htmlentities用法

WBOY
Release： 2016-06-13 11:19:33
Original
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在php中htmlspecialchars， 将特殊字元转成 HTML 格式,而htmlentities，将所有的字元都转成 HTML 字串 了，下面我来分别简单的介绍。  

htmlentities用法



$str = "John & 'Adams'";
echo htmlentities($str, ENT_COMPAT);
echo "
";
echo htmlentities($str, ENT_QUOTES);
echo "
";
echo htmlentities($str, ENT_NOQUOTES);
?>

John & 'Adams'
John & 'Adams'
John & 'Adams'

浏览器输出：
 代码如下 复制代码

 

htmlspecialchars用法

& (和) 转成 &
" (双引号) 转成 "
> (大于) 转成 >

例



$str = "John & 'Adams'";
echo htmlspecialchars($str, ENT_COMPAT);
echo "
";
echo htmlspecialchars($str, ENT_QUOTES);
echo "
";
echo htmlspecialchars($str, ENT_NOQUOTES);
?>

 代码如下 复制代码

 

他们的区别

这两个函数的功能都是转换字符为HTML字符编码，特别是url和代码字符串。防止字符标记被浏览器执行。使用中文时没什么区别,但htmlentities会格式化中文字符使得中文输入是乱码

htmlentities转换所有的html标记,htmlspecialchars只格式化& ' " 这几个特殊符号

 代码如下 复制代码

$str = '测试页面';

echo 'htmlentities指定GB2312编码：'.htmlentities($str,ENT_COMPAT,"GB2312").'';

echo 'htmlentities未指定编码：'.htmlentities($str).'';

$str = '测试页面';

echo htmlspecialchars($str).'';

效果:

 代码如下 复制代码

htmlentities指定GB2312编码：测试页面

htmlentities未指定编码：²âÊÔÒ³Ãæ

测试页面

Related labels：
htmlentities htmlspecialchars php exist usage
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