# maxdb_errno

# maxdb::errno

(PECL maxdb >= 1.0)

maxdb_errno -- maxdb::errno — Returns the error code for the most recent function call

### 说明

过程化风格

maxdb_errno ( resource `$link` ) : int

面向对象风格

int $maxdb->errno;

The maxdb_errno() function will return the last error code for the most recent MaxDB function call that can succeed or fail with respect to the database link defined by the `link` parameter. If no errors have occurred, this function will return zero.

### 返回值

An error code value for the last call, if it failed. zero means no error occurred.

### 范例

Example #1 面向对象风格

    <?php
    $maxdb = new maxdb("localhost", "MONA", "RED", "DEMODB");

    /* check connection */
    if (maxdb_connect_errno()) {
       printf("Connect failed: %s\n", maxdb_connect_error());
       exit();
    }

    if (!$maxdb->query("SELECT xxx FROM hotel.city")) {
       printf("Errorcode: %d\n", $maxdb->errno);
    }

    /* close connection */
    $maxdb->close();
    ?>

Example #2 过程化风格

    <?php
    $link = maxdb_connect("localhost", "MONA", "RED", "DEMODB");

    /* check connection */
    if (maxdb_connect_errno()) {
       printf("Connect failed: %s\n", maxdb_connect_error());
       exit();
    }

    if (!maxdb_query($link, "SELECT xxx FROM hotel.city")) {
       printf("Errorcode: %d\n", maxdb_errno($link));
    }

    /* close connection */
    maxdb_close($link);
    ?>

以上例程的输出类似于：

    PHP Warning:  maxdb_query(): -4005 POS(8) Unknown column name:XXX [42000] <...>
    Errorcode: -4005

### 参见

- maxdb_connect_errno() - Returns the error code from last connect call
- maxdb_connect_error() - Returns a string description of the last connect error
- maxdb_error() - Returns a string description of the last error
- maxdb_sqlstate() - Returns the SQLSTATE error from previous MaxDB operation