mysqli::$connect_errno

(PHP 5, PHP 7)

Returns the error code from last connect call

int mysqli_connect_errno ( void )

Object oriented style

int $mysqli->connect_errno;

Procedural style

Returns the last error code number from the last call to mysqli_connect().

Note:

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.

Returns:

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

Examples:

$mysqli->connect_errno example

Object oriented style

<?php
$mysqli = @new mysqli('localhost', 'fake_user', 'my_password', 'my_db');
 
if ($mysqli->connect_errno) {
    die('Connect Error: ' . $mysqli->connect_errno);
}
?>

Procedural style

<?php
$link = @mysqli_connect('localhost', 'fake_user', 'my_password', 'my_db');
 
if (!$link) {
    die('Connect Error: ' . mysqli_connect_errno());
}
?>

The above examples will output:

Connect Error: 1045