mysqli::$errno

定义和用法

errno / mysqli_errno() 函数返回最近一次函数调用的最后一个错误代码（如果有）。

实例

例子 1 - 面向对象风格

返回最近一次函数调用的最后一个错误代码（如果有）：

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

if ($mysqli -> connect_errno) {
  echo "Failed to connect to MySQL: " . $mysqli -> connect_error;
  exit();
}

// 执行查询，检查错误
if (!$mysqli -> query("INSERT INTO Persons (FirstName) VALUES ('Glenn')")) {
  echo("Errorcode: " . $mysqli -> errno);
}

$mysqli -> close();
?>

例子 2 - 过程式风格

返回最近一次函数调用的最后一个错误代码（如果有）：

<?php
$con=mysqli_connect("localhost","my_user","my_password","my_db");

if (mysqli_connect_errno()) {
  echo "Failed to connect to MySQL: " . mysqli_connect_error();
  exit();
}

// 执行查询，检查错误
if (!mysqli_query($con,"INSERT INTO Persons (FirstName) VALUES ('Glenn')")) {
  echo("Errorcode: " . mysqli_errno($con));
} 

mysqli_close($con);
?>