PHP mysqli connect_errno() Function

Example - Object Oriented style

Return an error code from the last connection error, if any:

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

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

Look at example of procedural style at the bottom.

Definition and Usage

The connect_errno / mysqli_connect_errno() function returns the error code from the last connection error, if any.

Syntax

Object oriented style:

$mysqli -> connect_errno

Procedural style:

mysqli_connect_errno()

Technical Details

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

Example - Procedural style

Return an error code from the last connection error, if any:

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

// Check connection
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
exit();
}
?>

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