Php/docs/function.sqlsrv-free-stmt
sqlsrv_free_stmt
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sqlsrv_free_stmt — Frees all resources for the specified statement
说明
sqlsrv_free_stmt
( resource $stmt
) : bool
Frees all resources for the specified statement. The statement cannot be used after sqlsrv_free_stmt() has been called on it. If sqlsrv_free_stmt() is called on an in-progress statement that alters server state, statement execution is terminated and the statement is rolled back.
参数
stmt- The statement for which resources are freed. Note that
nullis a valid parameter value. This allows the function to be called multiple times in a script.
返回值
成功时返回 true， 或者在失败时返回 false。
范例
Example #1 sqlsrv_free_stmt() example
<?php$serverName = "serverName\sqlexpress";$connectionInfo = array( "Database"=>"dbName", "UID"=>"username", "PWD"=>"password");$conn = sqlsrv_connect( $serverName, $connectionInfo);if( $conn === false ) { die( print_r( sqlsrv_errors(), true));}$stmt = sqlsrv_query( $conn, "SELECT * FROM Table_1");if( $stmt === false ) { die( print_r( sqlsrv_errors(), true));}/*------------------------------- Process query results here.-------------------------------*//* Free the statement resources. */sqlsrv_free_stmt( $stmt);?>
注释
The main difference between sqlsrv_free_stmt() and sqlsrv_cancel() is that a statement resource cancelled with sqlsrv_cancel() can be re-executed if it was created with sqlsrv_prepare(). A statement resource cancelled with sqlsrv_free_statement() cannot be re-executed.
