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mysqli::$connect_error

mysqli_connect_error

(PHP 5, PHP 7, PHP 8)

mysqli::$connect_error -- mysqli_connect_error — Returns a description of the last connection error

说明

面向对象风格

?string $mysqli->connect_error;

过程化风格

mysqli_connect_error(): ?string

Returns the error message from the last connection attempt.

参数

此函数没有参数。

返回值

A string that describes the error. null is returned if no error occurred.

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

示例

示例 #1 $mysqli->connect_error 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_error) {
/* Use your preferred error logging method here */
error_log('Connection error: ' . $mysqli->connect_error);
}

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_error());
}

参见