+# This program is in the public domain within the United States. Additionally,
+# we waive copyright and related rights in the work worldwide through the CC0
+# 1.0 Universal public domain dedication, which can be found at
+# http://creativecommons.org/publicdomain/zero/1.0/
+
+
+# pass an integer, returns the suffix
+function ordinal_suffix($i) {
+ # teens are all __th
+ if(strlen($i) > 1 && substr($i, -2, 1) === '1') {
+ return 'th';
+ }
+ switch(substr($i, -1)) {
+ case '':
+ return '';
+ case '1':
+ return 'st';
+ case '2':
+ return 'nd';
+ case '3':
+ return 'rd';
+ default;
+ return 'th';
+ }
+}
+
+# ordinalize(1) => "1st"
+# ordinalize(2) => "2nd"
+# ordinalize(3) => "3rd"
+# ordinalize(111) => "111th"
+# ordinalize("62") => "62nd"
+function ordinalize($i) {
+ return $i . ordinal_suffix($i);
+}
+
+# remove the $key from $_REQUEST and return it's value (or null if it's not there)
+function _REQUEST_cut($key) {
+ if(!isset($_REQUEST[$key])) {
+ return null;
+ }
+ $ret = $_REQUEST[$key];
+ unset($_REQUEST[$key]);
+ return $ret;
+}
+
+# returns an array containing just the elements of $pipes that are readable (without blocking)
+# timeout 0 means don't wait, timeout NULL means wait indefinitely
+function readable_sockets($pipes, $timeout = 0){
+ $read = array_values($pipes);
+ $ret = stream_select($read, $write = NULL, $exceptions = NULL, $timeout);
+ if($ret === false) {
+ return false;
+ }
+ if($ret) {
+ return $read;
+ } else {
+ return array();