與名稱中包含撇號的名稱匹配

Question

我有一個查詢要匹配fname和lname

$result = $mysqli->query('SELECT * FROM user WHERE userId = "'.$_SESSION["userId"].'" AND FriendFirstName = "'.htmlentities($firstName, ENT_QUOTES,"UTF-8").'" AND FriendLastName = "'.htmlentities($lastName, ENT_QUOTES,"UTF-8").'"   AND   FriendStatusCode="verified" AND friendId!='.$fid.' AND ViewableRow <> "0" ')  or die($mysqli->error);
echo 'SELECT * FROM user WHERE userId = "'.$_SESSION["userId"].'" AND FriendFirstName = "'.htmlentities($firstName, ENT_QUOTES,"UTF-8").'" AND FriendLastName = "'.htmlentities($lastName, ENT_QUOTES,"UTF-8").'"   AND   FriendStatusCode="verified" AND friendId!='.$fid.' AND ViewableRow <> "0" ';

如果我有一個名字John'y，那么它不會產生任何結果，它不返回任何行，我會回顯查詢，如果我運行相同的查詢，則會在sql中得到結果。

輸出變成這樣

SELECT * 
FROM user_friend_detail
WHERE userId = "9306" AND FriendFirstName = "Aa\'tid"
AND FriendLastName = "Kenddy" 
AND FriendStatusCode="verified" AND friendId!=9366 AND ViewableRow  "0"

並在mysql中返回行。 我關閉了魔術引號，我認為這是一個非常簡單的問題，但是卻浪費了我很多時間。

The FNAME is Aa'tid
The lname is Kenddy

我錯過了什么嗎？

Answer 1

由於我們已經討論了在注釋中更改為准備好的語句，因此您可以執行以下操作（這是面向對象的方法，與較舊的過程方法分開）：

// this code will use the following variables that you must set somewhere before running your query:
//     $firstName
//     $lastName
//     $fid
// it also uses:
//     $_SESSION["userId"]

// connect to the database (fill in values for your database below)
$mysqli = new mysqli('host','username','password','default database');

// build query with parameters
$query = "SELECT * FROM user WHERE userId = ? AND FriendFirstName = ? AND FriendLastName = ? AND FriendStatusCode='verified' AND friendId != ? AND ViewableRow <> '0'";

// prepare statement
if ($stmt = $mysqli->prepare($query)) {

    // bind parameters
    $stmt->bind_param("issi", $_SESSION['userId'], $firstName, $lastName, $fid);

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

    // set the variables to use to store the values of the results for each row (I made the variables up, in this case, let's assume your query returns 3 columns, `userId`, `firstName`, and `lastName`)
    $stmt->bind_result($returnUserId, $returnFirstName, $returnLastName);

    // loop through each row
    while ($stmt->fetch()) {

        // output the variables being looped through
        printf ("%d: %s %s\n", $returnUserId, $returnFirstName, $returnLastName);

    }

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

}

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

此示例不使用錯誤處理，但應該使用。 還有很多其他方法可用於結果集（例如，關聯數組），您可以查看要使用的文檔。 在此示例中，我使用bind_result遍歷行並實際分配變量，因為我認為這樣可以更bind_result ，更輕松地跟蹤何時有很多代碼。