BBCodeEmailAddressValidator

class BBCodeEmailAddressValidator {
function check_email_address($strEmailAddress) {
if (preg_match('/[\x00-\x1F\x7F-\xFF]/', $strEmailAddress)) {
return false;
}
$intAtSymbol = strrpos($strEmailAddress, '@');
if ($intAtSymbol === false) {
return false;
}
$arrEmailAddress[0] = substr($strEmailAddress, 0, $intAtSymbol);
$arrEmailAddress[1] = substr($strEmailAddress, $intAtSymbol + 1);
$arrTempAddress[0] = preg_replace('/"[^"]+"/'
,''
,$arrEmailAddress[0]);
$arrTempAddress[1] = $arrEmailAddress[1];
$strTempAddress = $arrTempAddress[0] . $arrTempAddress[1];
if (strrpos($strTempAddress, '@') !== false) {
return false;
}
if (!$this->check_local_portion($arrEmailAddress[0])) {
return false;
}
if (!$this->check_domain_portion($arrEmailAddress[1])) {
return false;
}
return true;
}
function check_local_portion($strLocalPortion) {
if (!$this->check_text_length($strLocalPortion, 1, 64)) {
return false;
}
$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;
}
function check_domain_portion($strDomainPortion) {
if (!$this->check_text_length($strDomainPortion, 1, 255)) {
return false;
}
if (preg_match('/^(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])'
.'(\.(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9]?[0-9])){3}$/'
,$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;
}
for ($i = 0, $max = sizeof($arrDomainPortion); $i < $max; $i++) {
if (!$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;
}
}
}
return true;
}
function check_text_length($strText, $intMinimum, $intMaximum) {
$intTextLength = strlen($strText);
if (($intTextLength < $intMinimum) || ($intTextLength > $intMaximum)) {
return false;
} else {
return true;
}
}
}