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Diffstat (limited to 'inc/EmailAddressValidator.php')
| -rw-r--r-- | inc/EmailAddressValidator.php | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/inc/EmailAddressValidator.php b/inc/EmailAddressValidator.php new file mode 100644 index 000000000..bb4ef0ca9 --- /dev/null +++ b/inc/EmailAddressValidator.php @@ -0,0 +1,191 @@ +<?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 $allowLocalAddresses = false; + + /** + * Check email address validity + * @param strEmailAddress Email address to be checked + * @return True if email is valid, false if not + */ + public function check_email_address($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 strLocalPortion Text to be checked + * @return 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 strDomainPortion Text to be checked + * @return 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 strText Text to be checked + * @param intMinimum Minimum acceptable length + * @param intMaximum Maximum acceptable length + * @return 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; + } + } + +} + |