# cubrid_prepare

(PECL CUBRID >= 8.3.0)

cubrid_prepare — Prepare a SQL statement for execution

### 说明

cubrid_prepare ( resource `$conn_identifier` , string `$prepare_stmt` [, int `$option` = 0 ] ) : resource

The cubrid_prepare() function is a sort of API which represents SQL statements compiled previously to a given connection handle. This pre-compiled SQL statement will be included in the cubrid_prepare().

Accordingly, you can use this statement effectively to execute several times repeatedly or to process long data. Only a single statement can be used and a parameter may put a question mark (?) to appropriate area in the SQL statement. Add a parameter when you bind a value in the VALUES clause of INSERT statement or in the WHERE clause. Note that it is allowed to bind a value to a MARK(?) by using the cubrid_bind() function only.

### 参数

`conn_identifier`

  Connection identifier.

`prepare_stmt`

  Prepare query.

`option`

  OID return option CUBRID_INCLUDE_OID.

### 返回值

Request identifier, if process is successful;

`FALSE`, if process is unsuccessful.

### 范例

Example #1 cubrid_prepare() example

    <?php
    $conn = cubrid_connect("localhost", 33000, "demodb");

    $sql = <<<EOD
    SELECT g.event_code, e.name
    FROM game g
    JOIN event e ON g.event_code=e.code
    WHERE host_year = ? AND event_code NOT IN (SELECT event_code FROM game WHERE host_year=?) GROUP BY event_code;
    EOD;

    $req = cubrid_prepare($conn, $sql);

    cubrid_bind($req, 1, 2004);
    cubrid_bind($req, 2, 2000);
    cubrid_execute($req);

    $row_num = cubrid_num_rows($req);
    printf("There are %d event that exits in 2004 olympic but not in 2000. For example:\n\n", $row_num);

    printf("%-15s %s\n", "Event_code", "Event_name");
    printf("----------------------------\n");

    $row = cubrid_fetch_assoc($req);
    printf("%-15d %s\n", $row["event_code"], $row["name"]);
    $row = cubrid_fetch_assoc($req);
    printf("%-15d %s\n", $row["event_code"], $row["name"]);

    cubrid_disconnect($conn);
    ?>

以上例程会输出：

    There are 27 event that exits in 2004 olympic but not in 2000. For example:

    Event_code      Event_name
    ----------------------------
    20063           +91kg
    20070           64kg

### 参见

- cubrid_execute() - Execute a prepared SQL statement
- cubrid_bind() - Bind variables to a prepared statement as parameters