正则从汉字字符串中取某一个汉字-PHP Tutorial-php.cn

正则从汉字字符串中取某一个汉字

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Release： 2016-06-23 13:59:54

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<?phpheader("Content-type: text/html; charset=gb2312"); $regex = '/大(\xhh{1})好啊/';   //这里该如何去写，我不会正则，希望大家能帮我解答一下，谢谢$str = '大家好啊';$matches = array(); if(preg_match($regex, $str, $matches)){    var_dump($matches);}?>

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我想取出“家”字

回复讨论(解决方案)

header("Content-type: text/html; charset=utf-8");$regex = '/大(.*?)好啊/';$str = '大家好啊';$matches = array();  if(preg_match($regex, $str, $matches)){    var_dump($matches);//array(2) { [0]=> string(12) "大家好啊" [1]=> string(3) "家" }}

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header("Content-type: text/html; charset=utf-8");$regex = '/大(.*?)好啊/';$str = '大家好啊';$matches = array();  if(preg_match($regex, $str, $matches)){    var_dump($matches);//array(2) { [0]=> string(12) "大家好啊" [1]=> string(3) "家" }}

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如果我str里面还有字母，得用gb2312格式的该如何去写？

有什么区别吗？

$regex = '/大(.*?)好啊/';$str = '大家好啊';$matches = array();   if(preg_match($regex, $str, $matches)){    var_dump($matches);}

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array(2) { [0]=> string(8) "大家好啊" [1]=> string(2) "家" }

有什么区别吗？

$regex = '/大(.*?)好啊/';$str = '大家好啊';$matches = array();   if(preg_match($regex, $str, $matches)){    var_dump($matches);}

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array(2) { [0]=> string(8) "大家好啊" [1]=> string(2) "家" } 会乱码。$str = 'a大家好啊';$regex = '/a大(.*?)好啊/';

会乱码。$str = 'a大家好啊';$regex = '/a大(.*?)好啊/';

header("Content-type: text/html; charset=gb2312"); $regex = '/大(.*?)好啊/';$str = '大家好啊';$str= mb_convert_encoding($str,'gb2312','UTF-8');$regex = mb_convert_encoding($regex,'gb2312','UTF-8');;$matches = array();   if(preg_match($regex, $str, $matches)){    var_dump($matches);//array(2) { [0]=> string(12) "大家好啊" [1]=> string(3) "家" }}

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怎么可能？

$regex = '/a大(.*?)好啊/';$str = 'a大家好啊';$matches = array();    if(preg_match($regex, $str, $matches)){    var_dump($matches);}

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array(2) { [0]=> string(9) "a大家好啊" [1]=> string(2) "家" }

文件编码？？？

谢谢回答问题各位大神，版主大人可能没看到我问题要求的编码是gb2312的。尤文球迷给的答案我试过了可以的，编码问题总是令人蛋疼。