(PHP 5, PHP 7, PHP 8)
mysqli::$connect_errno -- mysqli_connect_errno — Returns the error code from last connect call
此函数没有参数。
An error code for the last connection attempt, if it failed. Zero means no error occurred.
示例 #1 $mysqli->connect_errno example
面向对象风格
<?php
mysqli_report(MYSQLI_REPORT_OFF);
$mysqli = @new mysqli('localhost', 'fake_user', 'wrong_password', 'does_not_exist');
if ($mysqli->connect_errno) {
error_log('Connection error: ' . $mysqli->connect_errno);
}
过程化风格
<?php
mysqli_report(MYSQLI_REPORT_OFF);
$link = @mysqli_connect('localhost', 'fake_user', 'wrong_password', 'does_not_exist');
if (!$link) {
error_log('Connection error: ' . mysqli_connect_errno());
}