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mysqli::$connect_errno

mysqli_connect_errno

(PHP 5, PHP 7, PHP 8)

mysqli::$connect_errno -- mysqli_connect_errno — Returns the error code from last connect call

说明

面向对象风格

int $mysqli->connect_errno;

过程化风格

mysqli_connect_errno(): int

Returns the error code from the last connection attempt.

参数

此函数没有参数。

返回值

An error code for the last connection attempt, if it failed. Zero means no error occurred.

Returns the last connection error code regardless of the instance on which it is called.

示例

示例 #1 $mysqli->connect_errno example

面向对象风格

<?php

mysqli_report(MYSQLI_REPORT_OFF);
/* @ is used to suppress warnings */
$mysqli = @new mysqli('localhost', 'fake_user', 'wrong_password', 'does_not_exist');
if ($mysqli->connect_errno) {
/* Use your preferred error logging method here */
error_log('Connection error: ' . $mysqli->connect_errno);
}

过程化风格

<?php

mysqli_report(MYSQLI_REPORT_OFF);
/* @ is used to suppress warnings */
$link = @mysqli_connect('localhost', 'fake_user', 'wrong_password', 'does_not_exist');
if (!$link) {
/* Use your preferred error logging method here */
error_log('Connection error: ' . mysqli_connect_errno());
}

参见