update : 2015.11.03
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Returns the error code for the most recent function call
mysqli
PHP Manual

mysqli::$errno

mysqli_errno

(PHP 5)

mysqli::$errno -- mysqli_errno — Returns the error code for the most recent function call

설명

객체 기반 형식

int $mysqli->errno;

절차식 형식

int mysqli_errno ( mysqli $link )

Returns the last error code for the most recent MySQLi function call that can succeed or fail.

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.

인수

link

순차 형식 전용: mysqli_connect()나 mysqli_init()가 반환한 연결 식별자.

반환값

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

예제

Example #1 $mysqli->errno example

객체 기반 형식

<?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();
?>

절차식 형식

<?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);
?>

위 예제들의 출력:

Errorcode: 1193

참고

mysqli
PHP Manual