A Complete E-mail Validation Function

Today, I have something to do with an email validate then I had search by google to find all requirement i need to use, a few menuts later I have found this below:
but I am not still main hope of you, however it it the main concept for the email validation and easy use in PHP and not complicated in thinking, coz everything is completed.
//===============================================

Validate an email address.
Provide email address (raw input)
Returns true if the email address has the email
address format and the domain exists.
*/
function validEmail($email)
{
$isValid = true;
$atIndex = strrpos($email, "@");
if (is_bool($atIndex) && !$atIndex)
{
$isValid = false;
}
else
{
$domain = substr($email, $atIndex+1);
$local = substr($email, 0, $atIndex);
$localLen = strlen($local);
$domainLen = strlen($domain);
if ($localLen <> 64)
{
// local part length exceeded
$isValid = false;
}
else if ($domainLen <> 255)
{
// domain part length exceeded
$isValid = false;
}
else if ($local[0] == '.' || $local[$localLen-1] == '.')
{
// local part starts or ends with '.'
$isValid = false;
}
else if (preg_match('/\\.\\./', $local))
{
// local part has two consecutive dots
$isValid = false;
}
else if (!preg_match('/^[A-Za-z0-9\\-\\.]+$/', $domain))
{
// character not valid in domain part
$isValid = false;
}
else if (preg_match('/\\.\\./', $domain))
{
// domain part has two consecutive dots
$isValid = false;
}
else if
(!preg_match('/^(\\\\.|[A-Za-z0-9!#%&`_=\\/$\'*+?^{}|~.-])+$/',
str_replace("\\\\","",$local)))
{
// character not valid in local part unless
// local part is quoted
if (!preg_match('/^"(\\\\"|[^"])+"$/',
str_replace("\\\\","",$local)))
{
$isValid = false;
}
}
if ($isValid && !(checkdnsrr($domain,"MX") ||
↪checkdnsrr($domain,"A")))
{
// domain not found in DNS
$isValid = false;
}
}
return $isValid;
}
//===============================================
Reference: http://www.linuxjournal.com/article/9585

calculate (year, month, date) with PHP DateDiff Function

Today, I am really stress with the calculate the number of year, month, date which calcuated from the expired date with the current date, that so, I have search by google then making decision on the following style to improve my problem, and I am still on hesitat it yet, coz it's not fully requirement which I need, but this below function also the rest of solving problem with date... By this point, it show the number of year, or month, or date, .....

function datediff($interval, $datefrom, $dateto, $using_timestamps = false) {
/*
$interval can be:
yyyy - Number of full years
q - Number of full quarters
m - Number of full months
y - Difference between day numbers
(eg 1st Jan 2004 is "1", the first day. 2nd Feb 2003 is "33". The datediff is "-32".)
d - Number of full days
w - Number of full weekdays
ww - Number of full weeks
h - Number of full hours
n - Number of full minutes
s - Number of full seconds (default)
*/

if (!$using_timestamps) {
$datefrom = strtotime($datefrom, 0);
$dateto = strtotime($dateto, 0);
}
$difference = $dateto - $datefrom; // Difference in seconds

switch($interval) {

case 'yyyy': // Number of full years

$years_difference = floor($difference / 31536000);
if (mktime(date("H", $datefrom), date("i", $datefrom), date("s", $datefrom), date("n", $datefrom), date("j", $datefrom), date("Y", $datefrom)+$years_difference) > $dateto) {
$years_difference--;
}
if (mktime(date("H", $dateto), date("i", $dateto), date("s", $dateto), date("n", $dateto), date("j", $dateto), date("Y", $dateto)-($years_difference+1)) > $datefrom) {
$years_difference++;
}
$datediff = $years_difference;
break;

case "q": // Number of full quarters

$quarters_difference = floor($difference / 8035200);
while (mktime(date("H", $datefrom), date("i", $datefrom), date("s", $datefrom), date("n", $datefrom)+($quarters_difference*3), date("j", $dateto), date("Y", $datefrom)) < $dateto) {
$months_difference++;
}
$quarters_difference--;
$datediff = $quarters_difference;
break;

case "m": // Number of full months

$months_difference = floor($difference / 2678400);
while (mktime(date("H", $datefrom), date("i", $datefrom), date("s", $datefrom), date("n", $datefrom)+($months_difference), date("j", $dateto), date("Y", $datefrom)) < $dateto) {
$months_difference++;
}
$months_difference--;
$datediff = $months_difference;
break;

case 'y': // Difference between day numbers

$datediff = date("z", $dateto) - date("z", $datefrom);
break;

case "d": // Number of full days

$datediff = floor($difference / 86400);
break;

case "w": // Number of full weekdays

$days_difference = floor($difference / 86400);
$weeks_difference = floor($days_difference / 7); // Complete weeks
$first_day = date("w", $datefrom);
$days_remainder = floor($days_difference % 7);
$odd_days = $first_day + $days_remainder; // Do we have a Saturday or Sunday in the remainder?
if ($odd_days > 7) { // Sunday
$days_remainder--;
}
if ($odd_days > 6) { // Saturday
$days_remainder--;
}
$datediff = ($weeks_difference * 5) + $days_remainder;
break;

case "ww": // Number of full weeks

$datediff = floor($difference / 604800);
break;

case "h": // Number of full hours

$datediff = floor($difference / 3600);
break;

case "n": // Number of full minutes

$datediff = floor($difference / 60);
break;

default: // Number of full seconds (default)

$datediff = $difference;
break;
}

return $datediff;

}

?>

reference : http://www.addedbytes.com/php/php-datediff-function/

10 ways to Promote

by Ross Shannon

Most people think “website promotion — you mean search engines and stuff, right?” They go and submit to the search engines, do nothing else, and are left staring in disbelief at their barely-twitching hit counter. If only they thought about it some more, they’d realise that the other ‘stuff’ they were talking about is hugely important if you want your site to be attracting the big hits. Let's have a look at 10 easy steps to hit count heaven.
Reference : http://www.yourhtmlsource.com/promotion/10ways.html

website title randomization

Here, this a smallest website tilte randomization code in php which not complicated but it also important for the first step learning with php, I just got it from the website and want to keep it as properties for the general
learning, and still hope that it also concerning with the rest of studying. let me detail code as below:


// get a random number $randomize = rand(0, 4); // Change four to how many arrays you haveecho ($title[$randomize]); ?>see it in action.
$title[0] = "Web title 0"; // Title 0

$title[1] = "Web title 1"; // Title 1

$title[2] = "Web title 2"; // Title 2

$title[3] = "Web title 3"; // Title 3
$title[4] = "Web title 4"; // Title 4

// get a random number

$randomize = rand(0, 4); // Change four to how many arrays you have