191 lines
7.4 KiB
PHP
191 lines
7.4 KiB
PHP
<?php
|
|
/**
|
|
* EmailAddressValidator Class
|
|
*
|
|
* @author Dave Child <dave@addedbytes.com>
|
|
* @link http://code.google.com/p/php-email-address-validation/
|
|
* @license http://www.opensource.org/licenses/bsd-license.php
|
|
* @version SVN r10 + Issue 15 fix + Issue 12 fix
|
|
*/
|
|
class EmailAddressValidator {
|
|
/**
|
|
* Set true to allow addresses like me@localhost
|
|
*/
|
|
public $allowLocalAddresses = false;
|
|
|
|
/**
|
|
* Check email address validity
|
|
* @param string $strEmailAddress Email address to be checked
|
|
* @return bool True if email is valid, false if not
|
|
*/
|
|
public function check_email_address($strEmailAddress) {
|
|
|
|
// If magic quotes is "on", email addresses with quote marks will
|
|
// fail validation because of added escape characters. Uncommenting
|
|
// the next three lines will allow for this issue.
|
|
//if (get_magic_quotes_gpc()) {
|
|
// $strEmailAddress = stripslashes($strEmailAddress);
|
|
//}
|
|
|
|
// Control characters are not allowed
|
|
if (preg_match('/[\x00-\x1F\x7F-\xFF]/', $strEmailAddress)) {
|
|
return false;
|
|
}
|
|
|
|
// Check email length - min 3 (a@a), max 256
|
|
if (!$this->check_text_length($strEmailAddress, 3, 256)) {
|
|
return false;
|
|
}
|
|
|
|
// Split it into sections using last instance of "@"
|
|
$intAtSymbol = strrpos($strEmailAddress, '@');
|
|
if ($intAtSymbol === false) {
|
|
// No "@" symbol in email.
|
|
return false;
|
|
}
|
|
$arrEmailAddress[0] = substr($strEmailAddress, 0, $intAtSymbol);
|
|
$arrEmailAddress[1] = substr($strEmailAddress, $intAtSymbol + 1);
|
|
|
|
// Count the "@" symbols. Only one is allowed, except where
|
|
// contained in quote marks in the local part. Quickest way to
|
|
// check this is to remove anything in quotes. We also remove
|
|
// characters escaped with backslash, and the backslash
|
|
// character.
|
|
$arrTempAddress[0] = preg_replace('/\./'
|
|
,''
|
|
,$arrEmailAddress[0]);
|
|
$arrTempAddress[0] = preg_replace('/"[^"]+"/'
|
|
,''
|
|
,$arrTempAddress[0]);
|
|
$arrTempAddress[1] = $arrEmailAddress[1];
|
|
$strTempAddress = $arrTempAddress[0] . $arrTempAddress[1];
|
|
// Then check - should be no "@" symbols.
|
|
if (strrpos($strTempAddress, '@') !== false) {
|
|
// "@" symbol found
|
|
return false;
|
|
}
|
|
|
|
// Check local portion
|
|
if (!$this->check_local_portion($arrEmailAddress[0])) {
|
|
return false;
|
|
}
|
|
|
|
// Check domain portion
|
|
if (!$this->check_domain_portion($arrEmailAddress[1])) {
|
|
return false;
|
|
}
|
|
|
|
// If we're still here, all checks above passed. Email is valid.
|
|
return true;
|
|
|
|
}
|
|
|
|
/**
|
|
* Checks email section before "@" symbol for validity
|
|
* @param string $strLocalPortion Text to be checked
|
|
* @return bool True if local portion is valid, false if not
|
|
*/
|
|
protected function check_local_portion($strLocalPortion) {
|
|
// Local portion can only be from 1 to 64 characters, inclusive.
|
|
// Please note that servers are encouraged to accept longer local
|
|
// parts than 64 characters.
|
|
if (!$this->check_text_length($strLocalPortion, 1, 64)) {
|
|
return false;
|
|
}
|
|
// Local portion must be:
|
|
// 1) a dot-atom (strings separated by periods)
|
|
// 2) a quoted string
|
|
// 3) an obsolete format string (combination of the above)
|
|
$arrLocalPortion = explode('.', $strLocalPortion);
|
|
for ($i = 0, $max = sizeof($arrLocalPortion); $i < $max; $i++) {
|
|
if (!preg_match('.^('
|
|
. '([A-Za-z0-9!#$%&\'*+/=?^_`{|}~-]'
|
|
. '[A-Za-z0-9!#$%&\'*+/=?^_`{|}~-]{0,63})'
|
|
.'|'
|
|
. '("[^\\\"]{0,62}")'
|
|
.')$.'
|
|
,$arrLocalPortion[$i])) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Checks email section after "@" symbol for validity
|
|
* @param string $strDomainPortion Text to be checked
|
|
* @return bool True if domain portion is valid, false if not
|
|
*/
|
|
protected function check_domain_portion($strDomainPortion) {
|
|
// Total domain can only be from 1 to 255 characters, inclusive
|
|
if (!$this->check_text_length($strDomainPortion, 1, 255)) {
|
|
return false;
|
|
}
|
|
|
|
// some IPv4/v6 regexps borrowed from Feyd
|
|
// see: http://forums.devnetwork.net/viewtopic.php?f=38&t=53479
|
|
$dec_octet = '(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]\d|[0-9])';
|
|
$hex_digit = '[A-Fa-f0-9]';
|
|
$h16 = "{$hex_digit}{1,4}";
|
|
$IPv4Address = "$dec_octet\\.$dec_octet\\.$dec_octet\\.$dec_octet";
|
|
$ls32 = "(?:$h16:$h16|$IPv4Address)";
|
|
$IPv6Address =
|
|
"(?:(?:{$IPv4Address})|(?:".
|
|
"(?:$h16:){6}$ls32" .
|
|
"|::(?:$h16:){5}$ls32" .
|
|
"|(?:$h16)?::(?:$h16:){4}$ls32" .
|
|
"|(?:(?:$h16:){0,1}$h16)?::(?:$h16:){3}$ls32" .
|
|
"|(?:(?:$h16:){0,2}$h16)?::(?:$h16:){2}$ls32" .
|
|
"|(?:(?:$h16:){0,3}$h16)?::(?:$h16:){1}$ls32" .
|
|
"|(?:(?:$h16:){0,4}$h16)?::$ls32" .
|
|
"|(?:(?:$h16:){0,5}$h16)?::$h16" .
|
|
"|(?:(?:$h16:){0,6}$h16)?::" .
|
|
")(?:\\/(?:12[0-8]|1[0-1][0-9]|[1-9][0-9]|[0-9]))?)";
|
|
|
|
// Check if domain is IP, possibly enclosed in square brackets.
|
|
if (preg_match("/^($IPv4Address|\[$IPv4Address\]|\[$IPv6Address\])$/",
|
|
$strDomainPortion)){
|
|
return true;
|
|
} else {
|
|
$arrDomainPortion = explode('.', $strDomainPortion);
|
|
if (!$this->allowLocalAddresses && sizeof($arrDomainPortion) < 2) {
|
|
return false; // Not enough parts to domain
|
|
}
|
|
for ($i = 0, $max = sizeof($arrDomainPortion); $i < $max; $i++) {
|
|
// Each portion must be between 1 and 63 characters, inclusive
|
|
if (!$this->check_text_length($arrDomainPortion[$i], 1, 63)) {
|
|
return false;
|
|
}
|
|
if (!preg_match('/^(([A-Za-z0-9][A-Za-z0-9-]{0,61}[A-Za-z0-9])|'
|
|
.'([A-Za-z0-9]+))$/', $arrDomainPortion[$i])) {
|
|
return false;
|
|
}
|
|
if ($i == $max - 1) { // TLD cannot be only numbers
|
|
if (strlen(preg_replace('/[0-9]/', '', $arrDomainPortion[$i])) <= 0) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Check given text length is between defined bounds
|
|
* @param string $strText Text to be checked
|
|
* @param int $intMinimum Minimum acceptable length
|
|
* @param int $intMaximum Maximum acceptable length
|
|
* @return bool True if string is within bounds (inclusive), false if not
|
|
*/
|
|
protected function check_text_length($strText, $intMinimum, $intMaximum) {
|
|
// Minimum and maximum are both inclusive
|
|
$intTextLength = strlen($strText);
|
|
if (($intTextLength < $intMinimum) || ($intTextLength > $intMaximum)) {
|
|
return false;
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
}
|
|
|