# ingres_error

(PECL ingres >= 1.1.0)

ingres_error — Get a meaningful error message for the last error generated

### 说明

ingres_error ([ resource `$link` ] ) : string

Returns a string containing the last error, or NULL if no error has occurred.

If a `link` resource is passed to ingres_error(), it returns the last error recorded for the link. If no link is passed then ingres_error() returns the last error reported using the default link.

The function, ingres_error(), should always be called after executing any database query. Calling another function before ingres_error() is called will reset or change any error message from the last Ingres function call.

### 参数

`link`

  The connection link identifier

### 返回值

Returns a string containing the last error, or NULL if no error has occurred.

### 范例

Example #1 Get a message for the last error generated

    <?php
    $link = ingres_connect($database, $user, $password);

    $result = ingres_query($link, "select * from table");

    $error_text = ingres_error();

    if (!is_null($error_text)) {
       echo "An error occurred - " . $error_text;
    }
    ?>

### 参见

- ingres_errno() - Get the last Ingres error number generated
- ingres_errsqlstate() - Get the last SQLSTATE error code generated
- ingres_next_error() - Get the next Ingres error