我的正则表达式无法识别阿拉伯字符

Question

我想停止重复一个字符超过 3 次，将其转换为 juste 3 次。

示例：aaaaaaaaaaall => aaall

所以，我用英文字符做到了，而且成功了:

$patternReplace = '/(.){3,}/i';
$chaine = preg_replace($patternReplace, "", $chaine, -1 );

但它不适用于阿拉伯字符，例如：

أأأأأأأأأأأأأأأأأأأأأأأأأأأأ

感谢帮助

Answer 1

使用 u 修饰符：

$patternReplace = '/(.){3,}/iu';
$chaine = preg_replace($patternReplace, "", $chaine, -1 );

来自 PHP.net 的文档：

u (PCRE_UTF8)
This modifier turns on additional functionality of PCRE that is incompatible with Perl. Pattern and subject 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 and the subject is checked since PHP 4.3.5. An invalid subject will cause the preg_* function to match nothing; an invalid pattern will trigger an error of level E_WARNING. Five and six octet UTF-8 sequences are regarded as invalid since PHP 5.3.4 (resp. PCRE 7.3 2007-08-28); formerly those have been regarded as valid UTF-8.

我的正则表达式无法识别阿拉伯字符

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