JS的正则表达式 //校验是否全由数字组成 function isDigit(s) { var patrn=/^[0-9]{1,20}$/; if (!patrn.exec(s)) return false return true } //校验登录名:只能输入5-20个以字母开头、可带数字、“_”、“.”的字串 function isRegisterUserName(s) { var patrn=/^[a-zA-Z]{1}([a-zA-Z0-9]|[._]){4,19}$/; if (!patrn.exec(s)) return false return true } //校验用户姓...[ 查看全文 ]
$str = '中华人民共和国123456789abcdefg'; echo preg_match("/^[\u4e00-\u9fa5_a-zA-Z0-9]{3,15}$",$strName); 运行一下上面这段代码,看会有什么提示信息? Warning: preg_match(): Compilation failed: PCRE does not support \L, \l, \N, \P, \p, \U, \u, or \X at offset 3 in F:\wwwroot\php\test.php on line 2 原来,PHP正则表达式中不支持下列 Perl 转义序列:\L, \l, \N, \P, \p, \U, \u, or ...[ 查看全文 ]
首先,我们先看几个实际的例子: 1.验证输入字符是否 javascript: var ex = "^\\w+$"; var re = new RegExp(ex,"i"); return re.test(str); VBScript Dim regEx,flag,ex ex = "^\w+$" Set regEx = New RegExp regEx.IgnoreCase = True regEx.Global = True regEx.Pattern = ex flag = regEx.Test( str ) C# System.String ex = @"^\w+$"; System.Text.RegularExpressions.Rege...[ 查看全文 ]