PHP preg_replace 奇怪的内容为 £英镑符号和 ã
我正在应用以下函数
<?php
function replaceChar($string){
$new_string = preg_replace("/[^a-zA-Z0-9\sçéèêëñòóôõöàáâäåìíîïùúûüýÿ]/", "", $string);
return $new_string;
}
$string = "This is some text and numbers 12345 and symbols !£%^#&$ and foreign letters éèêëñòóôõöàáâäåìíîïùúûüýÿ";
echo replaceChar($string);
?>
，该函数工作正常，但如果我将 ã 添加到 preg_replace 中，就像
$new_string = preg_replace("/[^a-zA-Z0-9\sçéèêëñòóôõöàáâãäåìíîïùúûüýÿ]/", "", $string);
$string = "This is some text and numbers 12345 and symbols !£%^#&$ and foreign letters éèêëñòóôõöàáâäåìíîïùúûüýÿã";
它与英镑符号 £ 冲突，并将英镑符号替换为黑色方块中的不明问号。
这并不重要，但有人知道这是为什么吗？
谢谢巴里
更新
：谢谢大家。更改了添加 u 修饰符的函数：pt2.php.net/manual/en/… – 按照 Artefacto 的建议，效果很好
function replaceChar($string){
$new_string = preg_replace("/[^a-zA-Z0-9\sçéèêëñòóôõøöàáâãäåìíîïùúûüýÿ]/u", "", $string);
return $new_string;
}
I am applying the following function
<?php
function replaceChar($string){
$new_string = preg_replace("/[^a-zA-Z0-9\sçéèêëñòóôõöàáâäåìíîïùúûüýÿ]/", "", $string);
return $new_string;
}
$string = "This is some text and numbers 12345 and symbols !£%^#&$ and foreign letters éèêëñòóôõöàáâäåìíîïùúûüýÿ";
echo replaceChar($string);
?>
which works fine but if I add ã to the preg_replace like
$new_string = preg_replace("/[^a-zA-Z0-9\sçéèêëñòóôõöàáâãäåìíîïùúûüýÿ]/", "", $string);
$string = "This is some text and numbers 12345 and symbols !£%^#&$ and foreign letters éèêëñòóôõöàáâäåìíîïùúûüýÿã";
It conflicts with the pound sign £ and replaces the pound sign with the unidentified question mark in black square.
This is not critical but does anyone know why this is?
Thank you,
Barry
UPDATE: Thank you all. Changed functions adding the u modifier: pt2.php.net/manual/en/… – as suggested by Artefacto and works a treat
function replaceChar($string){
$new_string = preg_replace("/[^a-zA-Z0-9\sçéèêëñòóôõøöàáâãäåìíîïùúûüýÿ]/u", "", $string);
return $new_string;
}
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评论（4）
如果您的字符串采用 UTF-8 格式，则必须将
u修饰符添加到正则表达式中。像这样：If your string is in UTF-8, you must add the
umodifier to the regex. Like this:您的字符串很可能是 UTF-8，但 preg_replace() 正在处理字节
Chances are that your string is UTF-8, but preg_replace() is working on bytes
该代码是有效的......
也许你应该尝试中欧字符编码
that code is valid ...
maybe you should try Central-European character encoding
您可能想看看 mb_ereg_replace()。正如 Mark 提到的，preg_replace 仅适用于字节级别，对于多字节字符编码效果不佳。
干杯，
法比安
You might want to take a look at mb_ereg_replace(). As Mark mentioned preg_replace only works on byte level and does not work well with multibyte character encodings.
Cheers,
Fabian