为什么mb_ereg()不检测阿拉伯字符？

Question

我有一个来自PHP.net的检测阿拉伯语的例子。为什么不动呢？

$text = 'بيتر هو صبي.'; // arabic
//$text = 'פיטר הוא ילד.'; // hebrew

mb_regex_encoding('UTF-8');

if(mb_ereg('[\x{0600}-\x{06FF}]', $text)) // arabic range
//if(mb_ereg('[\x{0590}-\x{05FF}]', $text)) // hebrew range
{
    echo "Text has some arabic/hebrew characters.";
}
else
{
    echo "Text doesnt have arabic/hebrew characters.";
}

Answer 1

您不应该依赖字符范围来检测阿拉伯字符。您可以直接使用\p{Arabic}检测阿拉伯字母：

以下各项运作良好：

$text = 'بيتر هو صبي.'; // arabic
//$text = 'פיטר הוא ילד.'; // hebrew
if (preg_match('~\p{Arabic}~u', $text))
    echo "Text has some arabic/hebrew characters.";
else
    echo "Text doesnt have arabic/hebrew characters.";

输出：

Text has some arabic/hebrew characters.