Description
string
htmlspecialchars ( string string [, int quote_style [, string charset]] )
Certain characters have special significance in HTML, and should
be represented by HTML entities if they are to preserve their
meanings. This function returns a string with some of these
conversions made; the translations made are those most
useful for everyday web programming. If you require all HTML
character entities to be translated, use
htmlentities() instead.
This function is useful in preventing user-supplied text from
containing HTML markup, such as in a message board or guest book
application. The optional second argument, quote_style, tells
the function what to do with single and double quote characters.
The default mode, ENT_COMPAT, is the backwards compatible mode
which only translates the double-quote character and leaves the
single-quote untranslated. If ENT_QUOTES is set, both single and
double quotes are translated and if ENT_NOQUOTES is set neither
single nor double quotes are translated.
The translations performed are:
'&' (ampersand) becomes '&'
'"' (double quote) becomes '"' when ENT_NOQUOTES
is not set.
''' (single quote) becomes ''' only when
ENT_QUOTES is set.
'<' (less than) becomes '<'
'>' (greater than) becomes '>'
例子 1. htmlspecialchars() example
<?php
$new = htmlspecialchars("<a href='test'>Test</a>", ENT_QUOTES);
echo $new; ?>
|
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Note that this function does not translate anything beyond what
is listed above. For full entity translation, see
htmlentities(). Support for the optional
second argument was added in PHP 3.0.17 and PHP 4.0.3.
The third argument charset defines character set
used in conversion. The default character set is ISO-8859-1. Support for
this third argument was added in PHP 4.1.0.
PHP 4.3.0 及其后续版本支持如下字符集。
表格 1. 已支持字符集
字符集 | 别名 | 描述 |
---|
ISO-8859-1 | ISO8859-1 |
西欧,Latin-1
|
ISO-8859-15 | ISO8859-15 |
西欧,Latin-9。增加了 Latin-1(ISO-8859-1)中缺少的欧元符号、法国及芬兰字母。
|
UTF-8 | |
ASCII 兼容多字节 8-bit Unicode。
|
cp866 | ibm866, 866 |
DOS-特有的 Cyrillic 字母字符集。PHP 4.3.2 开始支持该字符集。
|
cp1251 | Windows-1251, win-1251, 1251 |
Windows-特有的 Cyrillic 字母字符集。PHP 4.3.2 开始支持该字符集。
|
cp1252 | Windows-1252, 1252 |
Windows 对于西欧特有的字符集。
|
KOI8-R | koi8-ru, koi8r |
俄文。PHP 4.3.2 开始支持该字符集。
|
BIG5 | 950 |
繁体中文,主要用于中国台湾。
|
GB2312 | 936 |
简体中文,国际标准字符集。
|
BIG5-HKSCS | |
繁体中文,Big5 的延伸,主要用于香港。
|
Shift_JIS | SJIS, 932 |
日文。
|
EUC-JP | EUCJP |
日文。
|
注:
ISO-8859-1 将代替任何其它无法识别的字符集。
See also get_html_translation_table(),
strip_tags(),
htmlentities(), and nl2br().