Validacion y comparacion de variables (strleng, strpos y substr )
By Mae Heller at Mar 20 2022
Oracle SUBSTR Function
By Estelle Fahey at Feb 14 2022
substr(start,length)
By Marjorie Wyman at Jul 11 2021
substr(start,length) - omit the second parameter
substr(start,length) - the second parameter is negative
has substr c++
By Roberta Rolfson at Jul 01 2021
php substr
By Monica Skiles at Apr 02 2021
substr (pos,length)
By Elmer Ritchie at Mar 31 2021
c++ substr
By Marilyn Walsh at Mar 01 2021
substr
By Ralph Fritsch at Feb 10 2021