(PHP 5, PHP 7, PHP 8)
mysqli::$errno -- mysqli_errno — Returns the error code for the most recent function call
Object-oriented style
Procedural style
Returns the last error code for the most recent MySQLi function call that can succeed or fail.
mysql
Procedural style only: A mysqli object returned by mysqli_connect() or mysqli_init()
An error code value for the last call, if it failed. zero means no error occurred.
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