(PHP 4 >= 4.3.0, PHP 5)
html_entity_decode -- Convert all HTML entities to their applicable characters
html_entity_decode() is the opposite of
htmlentities() in that it converts all HTML entities
to their applicable characters from string
.
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:
表 1. 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. |
The ISO-8859-1 character set is used as default for the optional third
charset
. This defines the character set used in
conversion.
PHP 4.3.0 及其后续版本支持如下字符集。
表 2. 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。 |
注意: ISO-8859-1 将代替任何其它无法识别的字符集。
注意: This function doesn't support multi-byte character sets in PHP < 5.
注意: You might wonder why trim(html_entity_decode(' ')); doesn't reduce the string to an empty string, that's because the ' ' entity is not ASCII code 32 (which is stripped by trim()) but ASCII code 160 (0xa0) in the default ISO 8859-1 characterset.
See also htmlentities(), htmlspecialchars(), get_html_translation_table(), and urldecode().