function eregi() is deprecated in email validation [duplicate] - php

Question

This question already has answers here:
How can I convert ereg expressions to preg in PHP?
(4 answers)
Closed 9 years ago.
Hi ı know that we do not eregi but preg_match but when ı change only eregi code it doesnt work, how can ı change the code below please just a little help, ı am a newbie
function verify_valid_email($emailtocheck)
{
$eregicheck = "^([-!#\$%&'*+./0-9=?A-Z^_`a-z{|}~])+#([-!#\$%&'*+/0-9=?A-Z^_`a-z{|}~]+\\.)+[a-zA-Z]{2,4}\$";
return eregi($eregicheck, $emailtocheck);
}
function verify_email_unique($emailtocheck)
{
global $config,$conn;
$query = "select count(*) as total from members where email='".mysql_real_escape_string($emailtocheck)."' limit 1";
$executequery = $conn->execute($query);
$totalemails = $executequery->fields[total];
if ($totalemails >= 1)
{
return false;
}
else
{
return true;
}
}

Answer 1

If you need to validate e-mail addresses, you can look at this page which provides a working example using only filter_var() :
if (filter_var($email_a, FILTER_VALIDATE_EMAIL)) {
echo "This ($email_a) email address is considered valid.";
};
So in your code, you should just drop all the regex/eregi stuff and use this instead :
return filter_var($emailtocheck, FILTER_VALIDATE_EMAIL);

Answer 2

If you want to do it this way, you can base yourself on the following methods:
<?php
$email = \"abc123#somewhere\"; // Invalid email address
//$email = \"somebody#somesite.com\"; // Valid email address
// Set up regular expression strings to evaluate the value of email variable against
$regex = '/^[_a-z0-9-]+(\.[_a-z0-9-]+)*#[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$/';
// Run the preg_match() function on regex against the email address
if (preg_match($regex, $email)) {
echo $email . \" is a valid email. We can accept it.\";
} else {
echo $email . \" is an invalid email. Please try again.\";
}
?>
or:
$string = "$emailtocheck";
if (preg_match(
'/^[^\W][a-zA-Z0-9_]+(\.[a-zA-Z0-9_]+)*\#[a-zA-Z0-9_]+(\.[a-zA-Z0-9_]+)*\.[a-zA-Z]{2,4}$/',
$string)) {
echo "Successful.";
}
or:
<?php
$email = "abc123#sdsd.com";
$regex = '/^[_a-z0-9-]+(\.[_a-z0-9-]+)*#[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$/';
if (preg_match($regex, $email)) {
echo $email . " is a valid email. We can accept it.";
} else {
echo $email . " is an invalid email. Please try again.";
}
?>
Source: https://stackoverflow.com/a/13719991/1415724
or:
<?php
// check e-mail address
// display success or failure message
if (!preg_match("/^([a-zA-Z0-9])+([\.a-zA-Z0-9_-])*#([a-zA-Z0-9_-
])+(\.[a-zA-Z0-9_-]+)*\.([a-zA-Z]{2,6})$/", $_POST['e-mail'])) {
die("Invalid e-mail address");
}
echo "Valid e-mail address, processing...";
?>
Source: http://www.techrepublic.com/article/regular-expression-engine-simplifies-e-mail-validation-in-php/
Plus, you can try what André Daniel wrote as an answer as well. You have many choices.