(PHP 5)
mysqli_connect_error — Returns a string description of the last connect error
Returns the last error message string from the last call to mysqli_connect().
A string that describes the error. An empty string if no error occurred.
Example#1 mysqli_connect_error() example
<?php
$link = @mysqli_connect("localhost", "nonexisting_user", "");
if (!$link) {
printf("Can't connect to localhost. Error: %s\n", mysqli_connect_error());
}
?>