// Get the date in string with Y-m-d format
$exp_date_s = "2013-04-22";
$today_s = date("Y-m-d");

// Convert the dates into timestamp
$exp_date = strtotime($exp_date_s);
$today = strtotime($today_s);

// Compare the timestamp
if ($exp_date > $today) {
  // Not yet expired
} else {
  // Expired
}

Done =)

Reference: Comparing Dates in PHP

// Assume you have a date string which is in d-m-Y format.
$date_string = '18-04-2013';

// Create the DateTime object
$date = date_create_from_format('d-m-Y', $date_string);

// Print the date in Y-m-d format.
print date('Y-m-d', $date->getTimestamp());

Done =)

Reference:

• StackOverflow – Convert this string to datetime
• PHP Manual – DateTime::createFromFormat

We can use PHP to detect the browser user agent such that it would redirect user to another URL if the request comes from a mobile device.

1. Create the user_agent.php.
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