REGEX email validator

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REGEX email validator

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#1 by (0 votes)

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The goal of my regex is to validate an mail address that may or may not exist according to the following parameters:

does not contain characters other than letters, numbers, underscores, and @
only 1 @
before @, there must be between 3 and 8 characters
after the arroba, there should be a total of 4 to 12 characters, with exactly one point.

The expression I have so far allows me to control that there are between 4 and 12 characters before the period after the arroba, but I can not modify it so that it fulfills the requested requirements.

The expression is:

^ (? = [^ @] {3,8} @) ([\ w.-] [a-zA-Z0-9 _] @ (? =. {4,12}. [^ .] $) [\ w -] [a-zA-Z0-9]. [a-zA-Z] [a-zA-Z] [a-zA-Z ]) $

regex

asked by Diego Collao Alcayaga 30.11.2018 в 16:57

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1 answer

as a full html code as TEXT in database through AJAX? I have problems with Font Awesome

score 0 · Accepted Answer

I usually use this website, regular expression generator , to generate some regular expressions and allows you to choose the programming language for the expression.

Just enter the required format

After das in "Show Matches"

And I will show you the suggestions so that you can go arming the expression.

for an example

the email: [email protected]

regular expression for javascript:

<html>
  <body>
    <script language=javascript>
      var txt='[email protected]';

      var re1='([\w-+]+(?:\.[\w-+]+)*@(?:[\w-]+\.)+[a-zA-Z]{2,7})';    // Email Address 1

      var p = new RegExp(re1,["i"]);
      var m = p.exec(txt);
      if (m != null)
      {
          var email1=m[1];
          document.write("("+email1.replace(/</,"&lt;")+")"+"\n");
      }
    </script>
  </body>
</html>

I hope it serves you.