mysqli
PHP Manual

mysqli_connect_errno

(PHP 5)

mysqli_connect_errno — Returns the error code from last connect call

说明

int mysqli_connect_errno ( void )

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.

返回值

An error code value for the last call to mysqli_connect(), if it failed. zero means no error occurred.

范例

Example#1 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());
}
?>

参见


mysqli
PHP Manual