PHP mysqli errno() Function

Example - Object Oriented style

Return the last error code for the most recent function call, if any:

<?php
$mysqli = new mysqli("localhost","my_user","my_password","my_db");

if ($mysqli -> connect_errno) {
echo "Failed to connect to MySQL: " . $mysqli -> connect_error;
exit();
}

// Perform a query, check for error
if (!$mysqli -> query("INSERT INTO Persons (FirstName) VALUES ('Glenn')")) {
echo("Errorcode: " . $mysqli -> errno);
}

$mysqli -> close();
?>

Look at example of procedural style at the bottom.

Definition and Usage

The errno / mysqli_errno() function returns the last error code for the most recent function call, if any.

Syntax

Object oriented style:

$mysqli -> errno

Procedural style:

mysqli_errno( connection)

Parameter Values

Parameter	Description
connection	Required. Specifies the MySQL connection to use

Technical Details

Return Value:	Returns an error code value. Zero if no error occurred
PHP Version:	5+

Example - Procedural style

Return the last error code for the most recent function call, if any:

<?php
$con=mysqli_connect("localhost","my_user","my_password","my_db");

if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
exit();
}

// Perform a query, check for error
if (!mysqli_query($con,"INSERT INTO Persons (FirstName) VALUES ('Glenn')")) {
echo("Errorcode: " . mysqli_errno($con));
}

mysqli_close($con);
?>

❮ PHP MySQLi Reference