email-validation

问题 This question already has an answer here: How to validate an email address using a regular expression? 73 answers Is there a good way to check a form input using regex to make sure it is a proper style email address? Been searching since last night and everybody that has answered peoples questions regarding this topic also seems to have problems with it if it is a subdomained email address. 回答1: There is no point. Even if you can verify that the email address is syntactically valid, you'll

问题 How can I validate the input value is a valid email address using php5. Now I am using this code function isValidEmail($email){ $pattern = \"^[_a-z0-9-]+(\\.[_a-z0-9-]+)*@[a-z0-9-]+(\\.[a-z0-9-]+)*(\\.[a-z]{2,3})$\"; if (eregi($pattern, $email)){ return true; } else { return false; } } but it shows deprecated error. How can I fix this issue. Please help me. 回答1: You can use the filter_var() function, which gives you a lot of handy validation and sanitization options. filter_var($email, FILTER

问题 I have come across this PHP code to check email address using SMTP without sending an email. Has anyone tried anything similar or does it work for you? Can you tell if an email customer / user enters is correct & exists? 回答1: There are two methods you can sometimes use to determine if a recipient actually exists: You can connect to the server, and issue a VRFY command. Very few servers support this command, but it is intended for exactly this. If the server responds with a 2.0.0 DSN, the user

问题 I have this function to validate an email addresses: function validateEMAIL($EMAIL) { $v = \"/[a-zA-Z0-9_-.+]+@[a-zA-Z0-9-]+.[a-zA-Z]+/\"; return (bool)preg_match($v, $EMAIL); } Is this okay for checking if the email address is valid or not? 回答1: The easiest and safest way to check whether an email address is well-formed is to use the filter_var() function: if (!filter_var($email, FILTER_VALIDATE_EMAIL)) { // invalid emailaddress } Additionally you can check whether the domain defines an MX

问题 How can an email address be validated in JavaScript? 回答1: Using regular expressions is probably the best way. You can see a bunch of tests here (taken from chromium) function validateEmail(email) { var re = /^(([^<>()\[\]\\.,;:\s@"]+(\.[^<>()\[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/; return re.test(String(email).toLowerCase()); } Here's the example of regular expresion that accepts unicode: var re = /^(([^<>()\[\]\.,

问题 Over the years I have slowly developed a regular expression that validates MOST email addresses correctly, assuming they don\'t use an IP address as the server part. I use it in several PHP programs, and it works most of the time. However, from time to time I get contacted by someone that is having trouble with a site that uses it, and I end up having to make some adjustment (most recently I realized that I wasn\'t allowing 4-character TLDs). What is the best regular expression you have or