How to Judge Chinese and English characters _php tutorial in PHP

Source: Internet
Author: User

How to Judge Chinese and English characters in PHP


PHP judges that the basis of English is the asii value of the character, while the asii value of the character differs depending on the encoding. In order to write a PHP program to judge the English characters, we must first understand the Asii value range of Chinese English characters under each code:

1. GBK (gb2312/gb18030)
\x00-\xff GBK Double byte encoding range
\x20-\x7f ASCII
\xa1-\xff Chinese gb2312
\x80-\xff Chinese GBK

2. UTF-8 (Unicode)

\U4E00-\U9FA5 (English)
\x3130-\x318f (Korean
\XAC00-\XD7A3 (Korean)
\u0800-\u4e00 (Japanese)





New Document


$str = "Chinese";
Echo $str;
echo "";

if (Preg_match ("/^[". Chr (0XA1). " -". Chr (0xff)." +$/", $str)) {//can only be used in GB2312 cases
if (Preg_match ("/^[\x7f-\xff]+$/", $str)) {//compatible gb2312,utf-8
echo "Correct input";
} else {
echo "Error input";
}
?>

http://www.bkjia.com/PHPjc/847207.html www.bkjia.com true http://www.bkjia.com/PHPjc/847207.html techarticle How to judge English and Chinese characters in PHP is based on the asii value of the character, and the asii value of the character differs depending on the encoding. In order to be able to write the English characters to determine the PHP program, ...

  • Contact Us

    The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

    If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

    A Free Trial That Lets You Build Big!

    Start building with 50+ products and up to 12 months usage for Elastic Compute Service

    • Sales Support

      1 on 1 presale consultation

    • After-Sales Support

      24/7 Technical Support 6 Free Tickets per Quarter Faster Response

    • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.