Limit each image to 1 MB.

UPLOAD_MAX_MB changes the limit, and UPLOAD_MAX_MB=none removes it.

get_data.lib.php

@@ -373,6 +373,24 @@ function upload_dir() {
   return $dir;
 }
 
+/*
+ * The largest image a story can have, in bytes, from UPLOAD_MAX_MB (1 MB
+ * by default). NULL means no limit, which UPLOAD_MAX_MB=none gives.
+ */
+function upload_max_bytes() {
+  $value = strtolower(trim((string)config('UPLOAD_MAX_MB', '')));
+  if ($value === 'none')
+    return NULL;
+  if (!is_numeric($value) || (float)$value <= 0)
+    $value = 1;
+  return (int)((float)$value * 1024 * 1024);
+}
+
+// The same in megabytes for a message, such as "1" or "2.5"
+function upload_max_mb() {
+  return rtrim(rtrim(number_format(upload_max_bytes() / 1048576, 2, '.', ''), '0'), '.');
+}
+
 function is_upload_name($name) {
   return is_string($name) && preg_match('/^[0-9a-f]{32}\z/', $name);
 }