note 120456 deleted from function.strlen by cmb

Note Submitter: Pelle_Gris ---- A strong advice: Never-Ever use "strlen" in intensive loop iterations (or similar), like this.. for ($i = 0; $i < strlen($crc); $i++) ..... It is notorious slow... This construct will use cpu each time to get the string length at each loop. Instead save the length in a variable and use that in the "for" loop. Note that You must not change the string length inside the loop then..).