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
(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.
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
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