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Mods-for-HESK-Netsyms/api/businesslogic/email_validators.php

119 rindas
3.3 KiB
PHP

<?php
/**
* @param string $address - the email address
* @param array $multiple_emails - true if HESK (or custom field) supports multiple emails
* @param bool $return_emails (def. true): return the email address(es). Otherwise a boolean is returned
*
* @return mixed|null|string - array if multiple valid emails, null if no email and not required, string if valid email
*/
function hesk_validateEmail($address, $multiple_emails, $return_emails = true) {
/* Allow multiple emails to be used? */
if ($multiple_emails) {
/* Make sure the format is correct */
$address = preg_replace('/\s/', '', $address);
$address = str_replace(';', ',', $address);
/* Check if addresses are valid */
$all = explode(',', $address);
foreach ($all as $k => $v) {
if (!hesk_isValidEmail($v)) {
unset($all[$k]);
}
}
/* If at least one is found return the value */
if (count($all)) {
if ($return_emails) {
return implode(',', $all);
}
return true;
} elseif (!$return_emails) {
return false;
}
} else {
/* Make sure people don't try to enter multiple addresses */
$address = str_replace(strstr($address, ','), '', $address);
$address = str_replace(strstr($address, ';'), '', $address);
$address = trim($address);
/* Valid address? */
if (hesk_isValidEmail($address)) {
if ($return_emails) {
return $address;
}
return true;
}
}
if ($return_emails) {
return null;
}
return true;
} // END hesk_validateEmail()
/**
* @param $email
* @return bool
*/
function hesk_isValidEmail($email) {
/* Check for header injection attempts */
if (preg_match("/\r|\n|%0a|%0d/i", $email)) {
return false;
}
/* Does it contain an @? */
$atIndex = strrpos($email, "@");
if ($atIndex === false) {
return false;
}
/* Get local and domain parts */
$domain = substr($email, $atIndex + 1);
$local = substr($email, 0, $atIndex);
$localLen = strlen($local);
$domainLen = strlen($domain);
/* Check local part length */
if ($localLen < 1 || $localLen > 64) {
return false;
}
/* Check domain part length */
if ($domainLen < 1 || $domainLen > 254) {
return false;
}
/* Local part mustn't start or end with a dot */
if ($local[0] == '.' || $local[$localLen - 1] == '.') {
return false;
}
/* Local part mustn't have two consecutive dots*/
if (strpos($local, '..') !== false) {
return false;
}
/* Check domain part characters */
if (!preg_match('/^[A-Za-z0-9\\-\\.]+$/', $domain)) {
return false;
}
/* Domain part mustn't have two consecutive dots */
if (strpos($domain, '..') !== false) {
return false;
}
/* Character not valid in local part unless local part is quoted */
if (!preg_match('/^(\\\\.|[A-Za-z0-9!#%&`_=\\/$\'*+?^{}|~.-])+$/', str_replace("\\\\", "", $local))) /* " */ {
if (!preg_match('/^"(\\\\"|[^"])+"$/', str_replace("\\\\", "", $local))) /* " */ {
return false;
}
}
/* All tests passed, email seems to be OK */
return true;
} // END hesk_isValidEmail()