php正则中文表达式
php正则中文表达式,实例代码如下:
- <?php
- $str = "abc一二三cde";
- echo preg_replace('/[^x4e00-x9fa5]/i'," ",$str);
- $str = "php编程";
- if (preg_match("/^[x4e00-x9fa5]+$/u",$str)) {
- print("该字符串全部是中文");
- } else {
- print("该字符串不全部是中文");
- }
- $action=trim($_get['action']);
- if($action=="sub")
- {
- $str=$_post['dir'];
- //if(!preg_match("/^[".chr(0xa1)."-".chr(0xff)."a-za-z0-9_]+$/",$str))?//gb2312汉字字母数字下划线正则表达式
- if(!preg_match("/^[x{4e00}-x{9fa5}a-za-z0-9_]+$/u",$str))//utf-8汉字字母数字下划线正则表达式
- {
- echo "<font color=red>您输入的[".$str."]含有违法字符</font>";
- }
- else{
- echo "<font color=green>您输入的[".$str."]完全合法,通过!</font>";
- }
- }
- ?>
- <form method="post" action="?action=sub">
- 输入字符(数字,字母,汉字,下划线):
- <input type="text" value="">
- <input type="submit" value="提交">
- </form>