(PHP 5, PHP 7, PHP 8)
mysqli::$connect_errno -- mysqli_connect_errno — Returns the error code from last connect call
面向對象風格
過程化風格
Returns the error code from the last connection attempt.
此函數(shù)沒有參數(shù)。
An error code for the last connection attempt, if it failed. Zero means no error occurred.
示例 #1 $mysqli->connect_errno example
面向對象風格
<?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);
}
過程化風格
<?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());
}