regular expression for email validation

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

The regex problem is that the email address and the name after Registrant are intercepted in the following article, but there are many different situations. how can I write a regular expression? Scenario 1: Registrant: nbsp; jinmi nbsp; jinmi8 nbsp; shenzhen, the question of gu regular

Mailbox Regular:Js:1 var regemail =/^ ([a-za-z0-9_-]) [email protected] ([a-za-z0-9_-]) + (\.[ A-za-z0-9_-]) +/; 2 // Validation 3 if (regemail.test (email)) {4 alert ("Success"); 5 }Php:1 $regEmail = "/^ ([a-za-z0-9_-]) [email protected] ([a-za-z0-9_-]) + (\.[ A-za-z0-9_-]) +/"; 2 if (preg_match($regEmail$

(Re.test (Str_url)) {return (true); } else {return (false); } Code two: function Checkurl (str) { var regurl = new RegExp (); Regurl.compile ("^[a-za-z]+://[a-za-z0-9-_]+\\.[ a-za-z0-9-_%\?\/.=]+$ ");//jihua.cnblogs.com if (! Regurl.test (str)) {return false; } return true; } Code Three: function Checkurl (urlstring) { if (urlstring!= ") { var reg=/(Http|ftp|https): \/\/[\w\-_]+ (\.[ \w\-_]+) + ([\w\-\.,@?^=%:/~\+#]*[\w\-\@?^=%/~\+#])?/; if (!reg.test (u

The regex problem is that the email address and the name after Registrant are intercepted in the following article, but there are many different situations. how can I write a regular expression? Scenario 1: problems with Registrant: nbsp; jinmi nbsp; jinmi8 nbsp; regular expressions, take the

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 pa

First look at the effect chart: First of all, to explain some of the symbolic relevance * Match the preceding subexpression 0 or more times;^ matches the start position of the input string; $ matches the end position of the input string1./^$/This is a common format.2. Enter the function you want to implement.\d matches a numeric character, equivalent to [0-9]+ Match the preceding subexpression one or more times;？ Matches the preceding subexpression 0 times or once;The following code to analy

"^" is outside of "[]" or "[]", it should be treated as a locator.Finally, the escape character "/" can be used when the user needs to include metacharacters in the pattern of the regular expression and find the matching object. For example:/th/*/the above regular expression will match the "th*" in the target object,

Here are some of the more commonly used regular expressions I've collected, because it's usually possible to use more of the form validation. Special sends out, lets each friend use together. Oh. Matching regular expressions for Chinese characters: [U4E00-U9FA5]Commentary: Matching Chinese is really a headache, with this exp