(PECL ibm_db2 >= 1.0.0)
db2_free_stmt — Frees resources associated with the indicated statement resource
$stmt): boolFrees the system and database resources that are associated with a statement resource. These resources are freed implicitly when a script finishes, but you can call db2_free_stmt() to explicitly free the statement resources before the end of the script.
stmtA valid statement resource.
成功時(shí)返回 true， 或者在失敗時(shí)返回 false。