php - Mysqli DELETE QUERY 在 PHP 脚本中不起作用

Question

我使用以下代码从表中删除一个条目我想要做的是检查是否从表中删除了任何值。如果删除了一个值，脚本应该打印成功，否则为 false。这就是我已经取得的成就现在。请帮忙

<?PHP
    $mysqli = new mysqli("SQLHOST.COM","CLIENT","PASSWORD", "DNAME", 1234);

    if ($mysqli->connect_errno) {
        printf("Connect failed: %s\n", $mysqli->connect_error);
        exit();
    }
    else
    {

    printf("cONN Sucees");


    if ($result = $mysqli->query("DELETE FROM ktable WHERE code='value'")) {
        printf("Select returned %d rows.\n", $result->num_rows);


     printf($result->num_rows);
        $result->close();
    }

    }
    ?>

Answer 1

你删除你需要返回的是affected_rows http://www.php.net/manual/en/mysqli.affected-rows.php

你需要更换什么

if ($result = $mysqli->query("DELETE FROM ktable WHERE code='value'")) {
    printf("Select returned %d rows.\n", $result->num_rows);


    printf($result->num_rows);
    $result->close();
}

工作代码

$value = ""; // Set To any Value
$mysqli = new mysqli ( "SQLHOST.COM", "CLIENT", "PASSWORD", "DNAME", 1234 );
if ($mysqli->connect_errno) {
    printf ( "Connect failed: %s\n", $mysqli->connect_error );
    exit ();
} else {
    printf ( "cONN Sucees" );
    if ($mysqli->query (sprintf ( "DELETE FROM ktable WHERE code='%s'", mysqli_real_escape_string ( $mysqli, $value ) ) )) {
        printf ( "Affected Rows  %d rows.\n", $mysqli->affected_rows );
    }
}

你应该有一个工作输出