+
+if(! function_exists('return_bytes')) {
+function return_bytes ($size_str) {
+ switch (substr ($size_str, -1))
+ {
+ case 'M': case 'm': return (int)$size_str * 1048576;
+ case 'K': case 'k': return (int)$size_str * 1024;
+ case 'G': case 'g': return (int)$size_str * 1073741824;
+ default: return $size_str;
+ }
+}}
+
+function generate_guid() {
+ $found = true;
+ do {
+ $guid = substr(random_string(),0,16);
+ $x = q("SELECT `uid` FROM `user` WHERE `guid` = '%s' LIMIT 1",
+ dbesc($guid)
+ );
+ if(! count($x))
+ $found = false;
+ } while ($found == true );
+ return $guid;
+}
\ No newline at end of file