Initial commit

functions.php

@@ -0,0 +1,46 @@
+<?php
+
+function timestamp_in_words($timestamp) {
+  if (!is_numeric($timestamp) || $timestamp < 0) {
+    return "";
+  }
+
+  $seconds = time() - $timestamp;
+  $future = $seconds < 0;
+  $seconds = abs($seconds);
+
+  $minutes = round($seconds / 60);
+  $hours = round($seconds / 3600);
+  $days = round($seconds / 86400);
+  $months = round($seconds / 2592000);
+  $years = round($seconds / 31536000);
+
+  if ($seconds < 60) { $w = 'less than a minute'; }
+  elseif ($seconds < 90) { $w = 'about a minute'; }
+  elseif ($minutes < 50) { $w = "$minutes minutes"; }
+  elseif ($hours < 2) { $w = 'about an hour'; }
+  elseif ($hours < 24) { $w = "$hours hours"; }
+  elseif ($days < 2) { $w = 'a day'; }
+  elseif ($days < 30) { $w = "$days days"; }
+  elseif ($days < 45) { $w = 'about a month'; }
+  elseif ($days < 365) { $w = "$months months"; }
+  elseif ($years < 2) { $w = 'about a year'; }
+  else { $w = "$years years"; }
+
+  return $future ? "$w from now" : "$w ago";
+}
+
+function guess_os() {
+  $os_guess = 'linux';
+  $user_agent = $_SERVER['HTTP_USER_AGENT'] ?? '';
+  if (stripos($user_agent, 'Android') !== false) {}
+  elseif (stripos($user_agent, 'iPhone') !== false) {}
+  elseif (stripos($user_agent, 'iPad') !== false) {}
+  elseif (stripos($user_agent, 'CrOS') !== false) { $os_guess = 'linux'; }
+  elseif (stripos($user_agent, 'Windows') !== false) { $os_guess = 'windows'; }
+  elseif (stripos($user_agent, 'Macintosh') !== false) {}
+  elseif (stripos($user_agent, 'Linux') !== false) { $os_guess = 'linux'; }
+  elseif (stripos($user_agent, 'FreeBSD') !== false) {}
+
+  return $os_guess;
+}