Returns a string description for last statement error

# mysqli_stmt::$error

# mysqli_stmt_error

(PHP 5, PHP 7, PHP 8)

mysqli_stmt::$error -- mysqli_stmt_error — Returns a string description for last statement error

### 说明

面向对象风格

string $mysqli_stmt->error;

过程化风格

function mysqli_stmt_error(mysqli_stmt `$statement`): string

Returns a string containing the error message for the most recently invoked statement function that can succeed or fail.

### 参数

`statement`
  仅以过程化样式：由 mysqli_stmt_init() 返回的 mysqli_stmt 对象。

### 返回值

A string that describes the error. An empty string if no error occurred.

### 示例

示例 #1 面向对象风格

    <?php
    /* Open a connection */
    $mysqli = new mysqli("localhost", "my_user", "my_password", "world");

    /* check connection */
    if (mysqli_connect_errno()) {
        printf("Connect failed: %s\n", mysqli_connect_error());
        exit();
    }

    $mysqli->query("CREATE TABLE myCountry LIKE Country");
    $mysqli->query("INSERT INTO myCountry SELECT * FROM Country");

    $query = "SELECT Name, Code FROM myCountry ORDER BY Name";
    if ($stmt = $mysqli->prepare($query)) {

        /* drop table */
        $mysqli->query("DROP TABLE myCountry");

        /* execute query */
        $stmt->execute();

        printf("Error: %s.\n", $stmt->error);

        /* close statement */
        $stmt->close();
    }

    /* close connection */
    $mysqli->close();
    ?>

示例 #2 过程化风格

    <?php
    /* Open a connection */
    $link = mysqli_connect("localhost", "my_user", "my_password", "world");

    /* check connection */
    if (mysqli_connect_errno()) {
        printf("Connect failed: %s\n", mysqli_connect_error());
        exit();
    }

    mysqli_query($link, "CREATE TABLE myCountry LIKE Country");
    mysqli_query($link, "INSERT INTO myCountry SELECT * FROM Country");

    $query = "SELECT Name, Code FROM myCountry ORDER BY Name";
    if ($stmt = mysqli_prepare($link, $query)) {

        /* drop table */
        mysqli_query($link, "DROP TABLE myCountry");

        /* execute query */
        mysqli_stmt_execute($stmt);

        printf("Error: %s.\n", mysqli_stmt_error($stmt));

        /* close statement */
        mysqli_stmt_close($stmt);
    }

    /* close connection */
    mysqli_close($link);
    ?>

以上示例会输出：

    Error: Table 'world.myCountry' doesn't exist.

### 参见

- mysqli_stmt_errno() - Returns the error code for the most recent statement call
- mysqli_stmt_sqlstate() - Returns SQLSTATE error from previous statement operation

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