(PHP 4, PHP 5, PHP 7, PHP 8)
utf8_decode — 将字符串从 UTF-8 转换为 ISO-8859-1，替换无效或者无法表示的字符。
此函数自 PHP 8.2.0 起弃用。强烈建议不要应用此函数。
$string): string
该函数将字符串 string 从 UTF-8 编码转换为
ISO-8859-1。字符串中不是有效 UTF-8 字节或者不存在于 ISO-8859-1
的 UTF-8 字符（即 U+00FF 以上的码点）将转化为 ?。
注意:
Many web pages marked as using the
ISO-8859-1character encoding actually use the similarWindows-1252encoding, and web browsers will interpretISO-8859-1web pages asWindows-1252.Windows-1252features additional printable characters, such as the Euro sign (€) and curly quotes (“”), instead of certainISO-8859-1control characters. This function will not convert suchWindows-1252characters correctly. Use a different function ifWindows-1252conversion is required.
stringUTF-8 编码的字符串。
返回 string 的 ISO-8859-1 翻译。
| 版本 | 说明 |
|---|---|
| 8.2.0 | 弃用此函数。 |
| 7.2.0 | This function has been moved from the XML extension to the core of PHP. In previous versions, it was only available if the XML extension was installed. |
示例 #1 基础示例
<?php
// Convert the string 'Zoë' from UTF-8 to ISO 8859-1
$utf8_string = "\x5A\x6F\xC3\xAB";
$iso8859_1_string = utf8_decode($utf8_string);
echo bin2hex($iso8859_1_string), "\n";
// Invalid UTF-8 sequences are replaced with '?'
$invalid_utf8_string = "\xC3";
$iso8859_1_string = utf8_decode($invalid_utf8_string);
var_dump($iso8859_1_string);
// Characters which don't exist in ISO 8859-1, such as
// '€' (Euro Sign) are also replaced with '?'
$utf8_string = "\xE2\x82\xAC";
$iso8859_1_string = utf8_decode($utf8_string);
var_dump($iso8859_1_string);
?>
以上例程会输出：
5a6feb string(1) "?" string(1) "?"