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mysqli_connect_errno
Returns the error code from last connect call
(PHP 5)
int mysqli_connect_errno ( )
Returns the last error code number from the last call to mysqli_connect().
Note:
Client error message numbers are listed in the MySQL
errmsg.h header file, server error message numbers
are listed in mysqld_error.h. In the MySQL source
distribution you can find a complete list of error messages and error
numbers in the file Docs/mysqld_error.txt.
Return Values
An error code value for the last call to mysqli_connect(), if it failed. zero means no error occurred.
Examples
Example 1478. mysqli_connect_errno() example
<?php
$link = @mysqli_connect("localhost", "nonexisting_user", "");
if (!$link) {
printf("Can't connect to localhost. Errorcode: %d\n", mysqli_connect_errno());
}
?>