mysqli::$errno

mysqli_errno

(PHP 5, PHP 7, PHP 8)

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

Description

Object-oriented style

int $mysqli->errno;

Procedural style

mysqli_errno(mysqli $mysql): int

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

Parameters

mysql: Procedural style only: A mysqli object returned by mysqli_connect() or mysqli_init()

Return Values

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

Examples

Example #1 $mysqli->errno example

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();
?>

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 will output:

Errorcode: 1193

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User Contributed Notes 1 note

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erwin at transpontine dot com ¶

11 years ago

You can also find the error codes for for example MySQL 5.5 here: http://dev.mysql.com/doc/refman/5.5/en/error-handling.html