PHP mysqli_stmt_sqlstate()用法及代碼示例

定義和用法

這個mysqli_stmt_sqlstate()函數返回在執行最後一條語句期間發生的 SQLSTATE 錯誤。

用法

mysqli_stmt_sqlstate($stmt);

參數

Sr.No	參數及說明
1	stmt(Mandatory) 這是一個表示語句(準備好的)的對象。

返回值

PHP mysqli_stmt_sqlstate() 函數返回一個字符串值，表示在執行最後一條語句期間發生的 SQLSTATE 錯誤。如果沒有錯誤，此函數返回 00000。

PHP版本

這個函數最初是在 PHP 版本 5 中引入的，適用於所有後續版本。

示例

以下示例演示了 mysqli_stmt_sqlstate() 函數的用法(程序風格) -

<?php
   $con = mysqli_connect("localhost", "root", "password", "mydb");

   mysqli_query($con, "CREATE TABLE emp(ID INT, FirstName VARCHAR(20))");
   print("Table Created.....\n");

   $stmt = mysqli_prepare($con, "INSERT INTO emp (ID) VALUES (?)");
   mysqli_stmt_bind_param($stmt, "s", $id);
   $id = 'test';

   //Executing the statement
   mysqli_stmt_execute($stmt);
   //State
   $state = mysqli_stmt_sqlstate($stmt);
   print("state:".$state);

   //Closing the statement
   mysqli_stmt_close($stmt);

   //Closing the connection
   mysqli_close($con);
?>

這將產生以下結果 -

Table Created.....
state:HY000

示例

在麵向對象的風格中，這個函數的語法是 $con ->sqlstate。以下是麵向對象風格的此函數的示例 -

<?php
   //Creating a connection
   $con = new mysqli("localhost", "root", "password", "mydb");

   $con -> query("CREATE TABLE myplayers(ID INT, First_Name VARCHAR(255), Last_Name VARCHAR(255), Place_Of_Birth VARCHAR(255), Country VARCHAR(255))");
   print("Table Created.....\n");
   $con -> query("INSERT INTO myplayers values(1, 'Sikhar', 'Dhawan', 'Delhi', 'India')");
   print("Record Inserted.....\n");

   $stmt = $con ->prepare("SELECT * FROM myplayers");

   $con ->query("DROP TABLE myplayers");

   //Executing the statement
   $stmt->execute();

   //SQl State
   $state = $stmt ->sqlstate;
   print("SQL State:".$state);

   //Closing the statement
   $stmt->close();

   //Closing the connection
   $con->close();
?>

這將產生以下結果 -

Table Created.....
Record Inserted.....
SQL State:42S02

示例

以下是 mysqli_stmt_sqlstate() 函數的另一個示例 -

<?php
   $con = mysqli_connect("localhost", "root", "password", "mydb");

   mysqli_query($con, "CREATE TABLE emp(ID INT, FirstName VARCHAR(20), LastName VARCHAR(5), DateOfBirth VARCHAR(255), Salary INT)");
   print("Table Created.....\n");

   $stmt = mysqli_prepare($con, "INSERT INTO emp values(?, ?, ?, ?, ?)");
   mysqli_stmt_bind_param($stmt, "isssi", $id, $fname, $lname, $pob, $country);
   $id = 1;
   $fname = 'Swetha';
   $lname = 'Yellapragada';
   $dob = DATE('1981-12-05');
   $country = 2366;
   //Executing the statement
   mysqli_stmt_execute($stmt);
   //Warnings
   $state = mysqli_stmt_sqlstate($stmt);
   print("state:".$state);

   //Closing the statement
   mysqli_stmt_close($stmt);

   //Closing the connection
   mysqli_close($con);
?>

這將產生以下結果 -

Table Created.....
state:22001