Summary of the regular expressions of Php/js Chinese characters _php tutorial

If we want to match the Chinese characters in PHP and JS as long as the use of regular/^[\\x{4e00}-\\x{9fa5}]+$/u, matching double-byte characters (including Chinese characters): [^/x00-/xff] can, specifically as follows

JS version

Regular expressions that match Chinese characters: [/U4E00-/U9FA5]

Match double-byte characters (including kanji): [^/x00-/xff]

The code is as follows	Copy Code
var reg =/^[u4e00-u9fa5]+$/; if (Reg.test (str)) { Alert (' Work of Chinese characters '); } Calculates the length of a string (a double-byte character length meter 2,ascii character 1) String.prototype.len=function () {return This.replace ([^/x00-/xff]/g, "AA"). Length;

PHP version

PHP matches Chinese characters!
/^[x{4e00}-x{9fa5}]+$/u

The code is as follows

Copy Code

$action = Trim ($_get[' action '); if ($action = = "Sub") { $str = $_post[' dir ']; if (!preg_match ("/^[". Chr (0XA1). " -". Chr (0xff)." a-za-z0-9_]+$/", $str))//gb2312 Chinese character alphanumeric underline regular expression if (!preg_match ("/^[x{4e00}-x{9fa5}a-za-z0-9_]+$/u", $str))//utf-8 Chinese alphanumeric underscore regular expression { echo "You entered [". $str. "] contain illegal characters "; } Else { echo "You entered [". $str. "] Perfectly legal, through! "; } }

Of course, if you want the string is all Chinese characters GBK2312 encoding matching is:

The code is as follows	Copy Code
$str = "little kid"; if (Preg_match ("/^[". Chr (0XA1). " -". Chr (0xff)." +$/", $str)) { Print ($str. " Indeed all are Chinese characters "); } else { Print ($str. " This really is not all a TMD is Chinese characters "); } UFT8 coded Regular $str = "Kanji"; if (Preg_match ("/^[x{4e00}-x{9fa5}]+$/u", $str)) { Print ("The string is all Chinese"); } else { Print ("The string is not all Chinese"); }

In fact, as long as the understanding of the high and low levels of each code start and end, then nature can write regular, and directly 16-bit, what is the difficulty? Oh. Note, however, that in PHP, the 16-bit is the x that is used.

Examples of gbk,gb2312:

The code is as follows

Copy Code

$action = Trim ($_get[' action '); if ($action = = "Sub") { $str = $_post[' dir ']; if (!preg_match ("/^[". Chr (0XA1). " -". Chr (0xff)." a-za-z0-9_]+$/", $str))//gb2312 Chinese character alphanumeric underline regular expression if (!preg_match ("/^[x{4e00}-x{9fa5}a-za-z0-9_]+$/u", $str))//utf-8 Chinese alphanumeric underscore regular expression { echo "You entered [". $str. "] contain illegal characters "; } Else { echo "You entered [". $str. "] Perfectly legal, through! "; } } ?>

The meaning of +$/u:

+ means repeat 1 or more times;
$ represents the end of the match;
/denotes delimiters;
U indicates that the pattern string is treated as UTF-8;
U means stop searching after the first match.

To match 2-4, denoted by {2,4}.
/^[x{4e00}-x{9fa5}]{2,4}$/u

http://www.bkjia.com/PHPjc/631567.html www.bkjia.com true http://www.bkjia.com/PHPjc/631567.html techarticle if we want to match the Chinese characters in PHP and JS as long as the use of regular/^[\\x{4e00}-\\x{9fa5}]+$/u, matching double-byte characters (including Chinese characters): [^/x00-/xff], the following JS version of the match ...

