+
+
+# pass anything, and get a valid date
+#
+# returns array($year, $month, $day)
+function clean_ymd($year, $month, $day) {
+ $year = intval($year, 10);
+ $month = intval($month, 10);
+ $day = intval($day, 10);
+
+ if($year < 100) {
+ $year += 2000;
+ }
+ if($month < 1) {
+ $month = 1;
+ } elseif($month > 12) {
+ $month = 12;
+ }
+ if($day < 1) {
+ $day = 1;
+ } else {
+ $max = date('t', mktime(12, 0, 0, $month, 1, $year));
+ if($day > $max) {
+ $day = $max;
+ }
+ }
+
+ return array($year, $month, $day);
+}
+
+# pass date like 3/21/99
+# returns array(year, month, day)
+function mdy_clean($date) {
+ $date = ereg_replace('[^0-9/-]', '', $date);
+ $date = ereg_replace('-', '/', $date);
+ $parts = explode('/', $date);
+ switch(count($parts)) {
+ case 1:
+ $year = $parts[0];
+ if(strlen($year) == 0) {
+ list($month, $day, $year) = explode('/', date('m/d/Y'));
+ } else {
+ list($month, $day) = explode('/', date('m/d'));
+ }
+ break;
+ case 2:
+ list($month, $year) = $parts;
+ $year = date('d');
+ break;
+ default:
+ list($month, $day, $year) = $parts;
+ }
+
+ return clean_ymd($year, $month, $day);
+}
+
+# convert date string from mm/dd/yyyy to yyyy-mm-dd
+function mdy_to_ymd($date) {
+ list($year, $month, $day) = mdy_clean($date);
+ return sprintf('%04u-%02u-%02u', $year, $month, $day);
+}
+
+# pass date like 2008-11-21
+# returns array(year, month, day)
+function ymd_clean($date) {
+ $date = ereg_replace('[^0-9/-]', '', $date);
+ $date = ereg_replace('/', '-', $date);
+ $parts = explode('-', $date);
+ switch(count($parts)) {
+ case 1:
+ $year = $parts[0];
+ if(strlen($year) == 0 || $year < 1971 || $year > 2050) {
+ list($year, $month, $day) = explode('-', date('Y-m-d'));
+ } else {
+ list($month, $day) = explode('-', date('m-d'));
+ }
+ break;
+ case 2:
+ list($year, $month) = $parts;
+ $year = date('d');
+ break;
+ default:
+ list($year, $month, $day) = $parts;
+ }
+
+ return clean_ymd($year, $month, $day);
+}
+
+# convert date string from yyyy-mm-dd to mm/dd/yyyy
+function ymd_to_mdy($str) {
+ list($year, $month, $day) = ymd_clean($str);
+ return sprintf('%02u/%02u/%04u', $month, $day, $year);
+}