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mysqli_errno

mysqli->errno

(PHP 5)

mysqli->errno — Returns the error code for the most recent function call

说明

Procedural style:

int mysqli_errno ( mysqli $link )

Object oriented style (property):

mysqli
int$errno;

Returns the last error code for the most recent MySQLi function call that can succeed or fail.

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.

参数

link

Procedural style only: A link identifier returned by mysqli_connect() or mysqli_init()

返回值

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

范例

Example#1 Object oriented style

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

/* check connection */
if (mysqli_connect_errno()) {
    
printf("Connect failed: %s\n"mysqli_connect_error());
    exit();
}

if (!
$mysqli->query("SET a=1")) {
    
printf("Errorcode: %d\n"$mysqli->errno);
}

/* close connection */
$mysqli->close();
?>

Example#2 Procedural style

<?php
$link 
mysqli_connect("localhost""my_user""my_password""world");

/* check connection */
if (mysqli_connect_errno()) {
    
printf("Connect failed: %s\n"mysqli_connect_error());
    exit();
}

if (!
mysqli_query($link"SET a=1")) {
    
printf("Errorcode: %d\n"mysqli_errno($link));
}

/* close connection */
mysqli_close($link);
?>

上例将输出:

Errorcode: 1193

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