php - PHP preg_replace 中的\w 仅覆盖 UTF-8 字符的第二个字节

Question

我们有这段代码:

$value = preg_replace("/[^\w]/", '', $value);

其中 $value 是 utf-8。在这个转换之后，多字节字符的第一个字节被剥离。如何让\w 完全覆盖 UTF-8 字符？

对不起，我的PHP不是很好

Answer 1

你可以 try with the /u modifier :

This modifier turns on additional functionality of PCRE that is incompatible with Perl. Pattern strings are treated as UTF-8. This modifier is available from PHP 4.1.0 or greater on Unix and from PHP 4.2.3 on win32. UTF-8 validity of the pattern is checked since PHP 4.3.5.

如果不行，试试

• mb_ereg_replace - 用多字节支持替换正则表达式

相反。