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[Phpgroupware-cvs] [21186] New feature: email address validator 4746:520
From: |
Sigurd Nes |
Subject: |
[Phpgroupware-cvs] [21186] New feature: email address validator 4746:5203 |
Date: |
Wed, 14 Apr 2010 19:07:28 +0000 |
Revision: 21186
http://svn.sv.gnu.org/viewvc/?view=rev&root=phpgroupware&revision=21186
Author: sigurdne
Date: 2010-04-14 19:07:28 +0000 (Wed, 14 Apr 2010)
Log Message:
-----------
New feature: email address validator 4746:5203
Added Paths:
-----------
people/sigurdne/modules/phpgwapi/trunk/inc/class.EmailAddressValidator.inc.php
Added:
people/sigurdne/modules/phpgwapi/trunk/inc/class.EmailAddressValidator.inc.php
===================================================================
---
people/sigurdne/modules/phpgwapi/trunk/inc/class.EmailAddressValidator.inc.php
(rev 0)
+++
people/sigurdne/modules/phpgwapi/trunk/inc/class.EmailAddressValidator.inc.php
2010-04-14 19:07:28 UTC (rev 21186)
@@ -0,0 +1,207 @@
+<?php
+
+ /*
+
+ EmailAddressValidator Class
+ http://code.google.com/p/php-email-address-validation/
+
+ Released under New BSD license
+ http://www.opensource.org/licenses/bsd-license.php
+
+ Sample Code
+ ----------------
+ $validator = new EmailAddressValidator;
+ if ($validator->check_email_address('address@hidden'))
+ {
+ // Email address is technically valid
+ }
+
+ */
+
+ class phpgwapi_EmailAddressValidator
+ {
+
+ /**
+ * 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]/',
$strEmailAddress))
+ {
+ return false;
+ }
+
+ // Check email length - min 3 (address@hidden), max 256
+ if (!$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($strDomainPortion, 1,
255))
+ {
+ return false;
+ }
+ // Check if domain is IP, possibly enclosed in square
brackets.
+ if
(preg_match('/^(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])'
+
.'(\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}$/'
+ ,$strDomainPortion) ||
+
preg_match('/^\[(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])'
+
.'(\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}\]$/'
+ ,$strDomainPortion))
+ {
+ return true;
+ }
+ else
+ {
+ $arrDomainPortion = explode('.',
$strDomainPortion);
+ if (sizeof($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;
+ }
+ }
+ }
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