htmlentities
(PHP 4, PHP 5)
htmlentities — Convert all applicable characters to HTML entities
说明
string htmlentities
( string $string
[, int $quote_style
[, string $charset
[, bool $double_encode
]]] )
This function is identical to htmlspecialchars() in all
ways, except with htmlentities(), all characters which
have HTML character entity equivalents are translated into these entities.
If you're wanting to decode instead (the reverse) you can use
html_entity_decode().
参数
-
string
-
The input string.
-
quote_style
-
Like htmlspecialchars(), the optional second
quote_style
parameter lets you define what will
be done with 'single' and "double" quotes. It takes on one of three
constants with the default being ENT_COMPAT:
Available quote_style
constants
| Constant Name |
Description |
| ENT_COMPAT |
Will convert double-quotes and leave single-quotes alone. |
| ENT_QUOTES |
Will convert both double and single quotes. |
| ENT_NOQUOTES |
Will leave both double and single quotes unconverted. |
-
charset
-
Like htmlspecialchars(), it takes an optional
third argument charset
which defines character
set used in conversion.
Presently, the ISO-8859-1 character set is used as the default.
PHP 4.3.0 及其后续版本支持如下字符集。
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。
|
Note:
ISO-8859-1 将代替任何其它无法识别的字符集。
-
double_encode
-
When double_encode
is turned off PHP will not
encode existing html entities. The default is to convert everything.
返回值
Returns the encoded string.
范例
Example#1 A htmlentities() example
<?php
$str = "A 'quote' is <b>bold</b>";
// Outputs: A 'quote' is <b>bold</b>
echo htmlentities($str);
// Outputs: A 'quote' is <b>bold</b>
echo htmlentities($str, ENT_QUOTES);
?>