(PHP 4 >= 4.3.2, PHP 5, PECL odbtp >= 1.1.1)
mssql_free_statement — Free statement memory
mssql_free_statement() only needs to be called if you are worried about using too much memory while your script is running. All statement memory will automatically be freed when the script ends. You may call mssql_free_statement() with the statement identifier as an argument and the associated statement memory will be freed.
成功时返回 TRUE， 或者在失败时返回 FALSE.
Example #1 mssql_free_statement() example
<?php
// Create a new statement
$stmt = mssql_init('test');
// Bind values here and execute the statement
// once we're done, we clear it from the memory
// using mssql_free_statement like so:
mssql_free_statement($stmt);
?>