(PECL ibm_db2 >= 1.0.0)
db2_free_stmt — Frees resources associated with the indicated statement resource
$stmt
)Frees 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.
stmt
A valid statement resource.
成功时返回 TRUE， 或者在失败时返回 FALSE。
alan at alanseiden dot com (2012-07-24 04:00:33)
db2_free_stmt() has been deprecated in favor of setting $stmt to an empty string. Example:
// close stmt resource and force it out of "scope"
$stmt = '';
Looks strange but it works.