+# date is yyyy-mm-dd
+function format_ymd($str) {
+ require_once('code/wfpl/time.php');
+ list($year, $month, $day) = ymd_clean($str);
+ return sprintf('%04u-%02u-%02u', $year, $month, $day);
+}
+
+# takes any of: HH :MM HH:MM
+# returns decimal number of hours
+#
+# You probably want to use format_hours() instead because it handles hours with a decimal point.
+function format_hours_minutes($str) {
+ if(strlen($str) == 0) {
+ return $str;
+ }
+ $pos = strpos($str, ':');
+ if($pos === false) {
+ $hours = format_int_0($str);
+ $minutes = 0;
+ } elseif($pos == 0) {
+ $hours = 0;
+ $minutes = format_int_0($str);
+ } else {
+ $hours = format_int_0(substr($str, 0, $pos));
+ $minutes = format_int_0(substr($str, $pos + 1));
+ }
+ return $hours + ($minutes / 60.0);
+}
+
+# takes any of: HH :MM HH:MM HH.hh(decimal hours)
+# returns decimal number of hours
+function format_hours($str) {
+ if(strlen($str) == 0) {
+ return $str;
+ }
+ if(strpos($str, ':') !== false) {
+ return format_hours_minutes($str);
+ } else {
+ return format_decimal($str);
+ }
+}
+
+# takes eg 12:23am
+# returns decimal number of hours since midnight
+function format_12hr_to_hours($str) {
+ if(eregi('noon', $str)) {
+ return 12;
+ }
+ $hours = format_hours($str);
+ if($hours < 12 && eregi('p', $str)) {
+ $hours += 12;
+ }
+ return $hours;
+}
+
+