Note that the memory is lost after doing this. If you had a key 'foo' with a value of 1000 bytes, that 1000 bytes is lost, and the DB file size will reflect this.
(PHP 4, PHP 5, PHP 7, PHP 8)
dba_delete — Elimina una entrada DBA especificada por clave
dba_delete() elimina la entrada especificada de la base de datos.
keyLa clave de la entrada que está siendo eliminada.
gestorEl gestor de base de datos, devuelto por dba_open() o dba_popen().
Note that the memory is lost after doing this. If you had a key 'foo' with a value of 1000 bytes, that 1000 bytes is lost, and the DB file size will reflect this.