与 php 中包含撇号的名称匹配

Question

我有一个查询，我想在其中匹配 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" ';

如果我有一个名字 John'y，那么它不会产生任何结果，它不会返回任何行，我会回显查询，如果我运行相同的查询，我会在我的 sql 中得到结果。

输出变成这样

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

它在mysql中返回行。我关闭了魔术引号，我认为这是一个非常简单的问题，但它浪费了我很多时间。

The FNAME is Aa'tid
The lname is Kenddy

我错过了什么吗？

Answer 1

由于我们已经讨论过在 cmets 中更改为准备好的语句，因此您可以执行以下操作（这是面向对象的方法，与旧的程序方法不同）：

// 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();

这个例子没有使用错误处理，但它应该使用。还有很多其他方法可以处理结果集（例如关联数组），您可以查看要使用的文档。在此示例中，我使用 bind_result 循环遍历行并实际分配变量，因为我相信当您有大量代码时它会更简洁且更易于跟踪。