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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 ( mysqli 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: 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`.

## 返回值

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

## 参见

mysqli_connect_errno(), mysqli_connect_error(), mysqli_error() 和 mysqli_sqlstate().

## 范例

例子 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(); ?>`

例子 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); ?>`

上例将输出：

    Errorcode: 1193

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