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# mysqli_errno

(PHP 5)

mysqli_errno

(no version information, might be only in CVS)

mysqli->errno -- Returns the error code for the most recent function call

## Description

Procedural style:

int mysqli_errno ( object link)

Object oriented style (property):

class mysqli {
int errno
}

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

> 注意: Client error message numbers are listed in the MySQL `errmsg.h` header file, server error message numbers are listed in `mysqld_error.h`. In the MySQL source distribution you can find a complete list of error messages and error numbers in the file `Docs/mysqld_error.txt`.

## Return values

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

## See also

mysqli_connect_errno(), mysqli_connect_error(), mysqli_error(), mysqli_sqlstate()

## Example

例 1. Object oriented style

`<?php $mysqli = new mysqli("localhost", "my_user", "my_password", "world"); /* check connection */ if (mysqli_connect_errno()) { printf("Connect failed: %s\n", mysqli_connect_error()); exit(); } if (!$mysqli->query("SET a=1")) { printf("Errorcode: %d\n", $mysqli->errno); } /* close connection */ $mysqli->close(); ?>`

例 2. Procedural style

`<?php $link = mysqli_connect("localhost", "my_user", "my_password", "world"); /* check connection */ if (mysqli_connect_errno()) { printf("Connect failed: %s\n", mysqli_connect_error()); exit(); } if (!mysqli_query($link, "SET a=1")) { printf("Errorcode: %d\n", mysqli_errno($link)); } /* close connection */ mysqli_close($link); ?>`

The above examples would produce the following output:

    Errorcode: 1193

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