regular expression to validate email address

Regular expression to validate numbersVerification Number: ^[0-9]*$To verify N-bit numbers: ^\d{n}$Verify that at least n digits: ^\d{n,}$Verify the number of m-n bits: ^\d{m,n}$Verify numbers starting with 0 and non 0: ^ (0|[ 1-9][0-9]*) $Verify that there is a positive real number with two decimal places: ^[0-9]+ (. [ 0-9]{2})? $Verify that there is a positive

Regular Expression ---------- Match ip address, regular expression of IP Address Regular Expression ^ (25 [0-5] | 2 [0-4] [0-9] | [0-1] {

The inter-domain name format is as follows: Domain names are composed of specific character sets, English letters, numbers, and "-" (that is, hyphens or minus signs) of each country's text, but neither the beginning nor the end can contain "-", "-" and "-" cannot appear continuously. The letters in the domain name are not case-insensitive. The domain name can be up to 60 bytes (including suffix. com,. NET,. org, and so on). /^[a-z] ([a-z0-9]*[-_]?[ a-z0-9]+) *@ ([a-z0-9]*[-_]?[ a-z0-9]+) +[\.]

PHP regular expression verification Email method, PHP verification Email method. PHP regex verification Email method. PHP verification Email method this article describes the PHP regex verification

Try testing the following form with valid and invalid email addresses. The Code uses JavaScript to match the users input with a regular expression. Function code: Copy Code code as follows: function Validate (Form_id,email) { var reg =/^ ([a-za-z0-9_\-\.])

-9] * $" // positive integer"^ (-\ D +) | (0 +) $" // non-positive integer (negative integer + 0)"^-[0-9] * [1-9] [0-9] * $" // negative integer"^ -? \ D + $ "// integer"^ \ D + (\. \ d + )? $ "// Non-negative floating point number (Positive floating point number + 0)"^ ([0-9] + \. [0-9] * [1-9] [0-9] *) | ([0-9] * [1-9] [0-9] * \. [0-9] +) | ([0-9] * [1-9] [0-9] *) $ "// Positive floating point number"^ (-\ D + (\. \ d + )?) | (0 + (\. 0 + )?)) $ "// Non-Positive floating point number (negative

To find a regular expression that validates a user nameDear eldest sister, the younger generation to seek a verification of the user name of the regular expression, hard thinking for one weeks or did not get out, I am dull, also hope everyone advice!VBScript programming requires that the characters of the username be c

e-mail address validation Regular expression e-mail address verification in Dedecms Copy Code code as follows: $email = "test@jb51.com"; Mailbox Format Check function Checkemail ($email) { Return Ere

Verify the correctness of the input public static bool isEmail( string inputEmail ) { 　　inputEmail = NulltoString( inputEmail ); 　　string strRegex = @"^([a-zA-Z0-9_\-\.]+)@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.)|(([a-zA-Z0-9\-]+\.)+))([a-zA-Z]{2,4}|[0-9]{1,3})(\]?)$"; 　　Regex re = new Regex( strRegex ); 　　if ( re.IsMatch( inputEmail ) ) 　　return ( true ); 　　else 　　return ( false ); } Verify the correctness of the email

Regular expressions ^ (\d{1,2}|1\d\d|2[0-4]\d|25[0-5]) \. (\d{1,2}|1\d\d|2[0-4]\d|25[0-5]) \. (\d{1,2}|1\d\d|2[0-4]\d|25[0-5]) \. (\d{1,2}|1\d\d|2[0-4]\d|25[0-5]) $ Matching 0.0.0.0 | 255.255.255.02 | 192.168.0.136 Mismatched 256.1.3.4 | 023.44.33.22 | 10.57.98.23. Regular expressions ^ (HTTP|HTTPS|FTP) \://((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[ 1-9][0-9]| [0-9]) \.) {3} (25[0-5]|2[0-4][0-9]|1[0-9][0-9]

Copy Code code as follows: if (Eregi (^[_.0-9a-z-]+@) ([0-9a-z][0-9a-z-]+.) +[a-z]{2,3}$ ", $email)) { echo "Your e-mail through preliminary check"; } ?> In this sentence, the first is to apply a eregi function, this function is very good understanding. Find a book and give you an explanation: Syntax: int ereg (string pattern, string string, array [regs]); return value: Integer/array This function resolves string strings using

To use a regular expression to match an IP address, write ^ 192.168. [0-255] +. [0-255] $, but it is incorrect! [] [0-9a-z] But not [0-255] Regular Expressions Use a regular expression to match the IP

This regular expression that matches the URL address is a regular expression that we write specifically to match all the URL addresses in order to filter the external URL address inside the post. Is after the thoroughly tempered,

This regular expression that matches the URL address is a regular expression that we specifically write to filter the external URL address in the post to match all URL addresses. is a strong r