Php/func mysqli sqlstate
来自菜鸟教程
PHP mysqli sqlstate()函数
示例-面向对象的样式
返回最后一个错误的SQLSTATE错误代码:
<?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(); } // Table Persons already exists, so we should get an error $sql = "CREATE TABLE Persons (Firstname VARCHAR(30), Lastname VARCHAR(30), Age INT)" if (!$mysqli -> query($sql)) { echo "SQLSTATE error: ". $mysqli -> sqlstate; } $mysqli -> close(); ?>
在底部查看程序样式的示例。
定义和用法
sqlstate / mysqli_sqlstate()函数返回上一个错误的SQLSTATE错误代码。
错误代码由五个字符组成。“ 00000”表示没有错误。这些值由ANSI SQL和ODBC指定。
句法
面向对象的样式:
$mysqli -> sqlstate
程序风格:
mysqli_sqlstate(connection)
参数值
参数 | 描述 |
---|---|
connection | 需要。指定要使用的MySQL连接 |
技术细节
返回值: | 包含最后一个错误的SQLSTATE错误代码的字符串 |
PHP版本: | 5+ |
示例-程序状态
返回最后一个错误的SQLSTATE错误代码:
<?php $con=mysqli_connect("localhost","my_user","my_password","my_db"); // Check connection if (mysqli_connect_errno()) { echo "Failed to connect to MySQL: " . mysqli_connect_error(); exit; } // Table Persons already exists, so we should get an error $sql = "CREATE TABLE Persons (Firstname VARCHAR(30), Lastname VARCHAR(30), Age INT)" if (!mysqli_query($con, $sql)) { echo "SQLSTATE error: ". mysqli_sqlstate($con); } // Close connection mysqli_close($con); ?>