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php中正则匹配中文汉字

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Jun 13, 2016 am 10:15 AM

phpChinesematchexiststringusregularChinese characterKnowObtainneedpage

在php中如果你想正则来获取字符串中汉字我们先需要知道页面编码，正则匹配中文汉字根据页面编码不同而略有区别：GBK/GB2312编码：[x80-xff>]+ 或 [xa1-xff]+ 而UTF-8编码：[x{4e00}-x{9fa5}]+/u 。

例

代码如下	复制代码
echo (mb_eregi("[x80-xff].","中d文") ? "有" : "无") ."汉字"; echo (mb_eregi("^([x80-xff].)+$","中文") ? "全是汉字" : ""); 看一判断全中文字符串函数

以下以PHP为例进行匹配：

代码如下

复制代码

   $str = "学习php是一件快乐的事。";
   preg_match_all("/[x80-xff]+/", $str, $match);
   //UTF-8 使用：
   //preg_match_all("/[x{4e00}-x{9fa5}]+/u", $str, $match);
   print_r($match);
?>

输出：

Array
(
    [0] => Array
        (
            [0] => 学习
            [1] => 是一件快乐的事。
        )

)

正则汉字

代码如下	复制代码
$str = "请问php中的eregi如何匹配汉字"; if (preg_match("/^[".chr(0x80)."-".chr(0xff)."]+$/",$str)) { echo "这是一个纯中文字符串"; } else{ echo "这不是一个纯中文字串"; } preg_match_all($pat,……)与preg_replace($pat,……)……

preg_match_all("/(汉字)+/ism","我是汉字，看你把我怎么着！",$m_a);
了各个编码的高位与低位的开始与结束，那么自然就可以写出正则，而且直接是十六位的，有啥困难？呵呵。不过要注意，在php里面，表示十六位是用的x

我们还可以用该正则表达式来判断是否是gb2312的汉字

代码如下	复制代码
$str = "小小子"; if(preg_match("/^[xb0-xf7][xa0-xfe]+$/",$str)){ print($str."确实全是汉字"); } else { print($str."这个真tc不全是汉字"); } ?>

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