使用查找/字典数组替换结果集中的列值答案

【问题标题】：Replace column values in result set using a lookup/dictionary array使用查找/字典数组替换结果集中的列值
【发布时间】：2016-09-13 15:11:14
【问题描述】：

您可以在下面找到整个代码。

我有 2 个数组。第一个数组如下所示：

// Replace ID_CHAT_ with readable value
$replacements = array(
    'ID_CHAT_ATTACK/DEFEND' => 'Attack/Defend!',
    'ID_CHAT_REQUEST_MEDIC' => 'Request Medic!',
    'ID_CHAT_REQUEST_AMMO' => 'Request Ammo!',
    'ID_CHAT_REQUEST_RIDE' => 'Request Ride!',
    'ID_CHAT_NEGATIVE' => 'Negative!',
    'ID_CHAT_SORRY' => 'Sorry!',
    'ID_CHAT_GOGOGO' => 'Go Go Go!',
    'ID_CHAT_AFFIRMATIVE' => 'Affirmative!',
    'ID_CHAT_REQUEST_ORDER' => 'Request Order!',
    'ID_CHAT_THANKS' => 'Thanks!',
);

第二个数组是这样的：（来自 mysqli 结果集）

[31] => Array
    (
        [ID] => 2179
        [logDate] => 2016-05-12 22:10:38
        [ServerID] => 2
        [logSubset] => Team
        [logSoldierName] => OPTIMUS-GOLD
        [logMessage] => ID_CHAT_REQUEST_AMMO
        [logPlayerID] => 1071
    )

[32] => Array
    (
        [ID] => 2178
        [logDate] => 2016-05-12 22:10:34
        [ServerID] => 2
        [logSubset] => Team
        [logSoldierName] => CaptaineGamingFR
        [logMessage] => ID_CHAT_REQUEST_RIDE
        [logPlayerID] => 1531
    )

[33] => Array
    (
        [ID] => 2177
        [logDate] => 2016-05-12 22:10:27
        [ServerID] => 2
        [logSubset] => Team
        [logSoldierName] => CaptaineGamingFR
        [logMessage] => ID_CHAT_GOGOGO
        [logPlayerID] => 1531
    )

[34] => Array
    (
        [ID] => 2176
        [logDate] => 2016-05-12 22:10:11
        [ServerID] => 2
        [logSubset] => Global
        [logSoldierName] => CaptaineGamingFR
        [logMessage] => cool des francais
        [logPlayerID] => 1531
    )

[35] => Array
    (
        [ID] => 2175
        [logDate] => 2016-05-12 22:10:08
        [ServerID] => 2
        [logSubset] => Global
        [logSoldierName] => Minotaures
        [logMessage] => et sa s affiche sur tt les serveur
        [logPlayerID] => 1337
    )

我想将第二个数组中的 logMessage 值替换为对应的$replacements 值。

它应该是什么样子：

[logMessage] => **ID_CHAT_REQUEST_AMMO**

必须

[logMessage] => Request Ammo!

当前代码：

public function serverChatlog( $serverID = null ) {
        
    // Replace ID_CHAT_ with readable value
    $replacements = array(
        'ID_CHAT_ATTACK/DEFEND' => 'Attack/Defend!',
        'ID_CHAT_REQUEST_MEDIC' => 'Request Medic!',
        'ID_CHAT_REQUEST_AMMO' => 'Request Ammo!',
        'ID_CHAT_REQUEST_RIDE' => 'Request Ride!',
        'ID_CHAT_NEGATIVE' => 'Negative!',
        'ID_CHAT_SORRY' => 'Sorry!',
        'ID_CHAT_GOGOGO' => 'Go Go Go!',
        'ID_CHAT_AFFIRMATIVE' => 'Affirmative!',
        'ID_CHAT_REQUEST_ORDER' => 'Request Order!',
        'ID_CHAT_THANKS' => 'Thanks!',
    );
        
    // Create an array.
    $output = array();
        
    // Query the database
    $query  = $this->connectDB()->query( 'SELECT * FROM `tbl_chatlog` ORDER BY `ID` DESC' );
    $result = $query->num_rows;
    $array  = $query->fetch_all(MYSQLI_ASSOC);
        
    // Return the results in JSON format
    if( $result > 0 ) {
        $output = json_encode( $array, JSON_PRETTY_PRINT );
        return json_decode( $output, true );
    } else {
        return false;
    }
}

【问题讨论】：

您已经尝试过什么了吗？如果您需要线索，请查看array_search 方法
是的，我尝试了很多东西。还有 Allen Butler 的遮阳篷。但是，它只替换 1 个值而不是所有值。

标签： php mysql arrays mysqli replace

【解决方案1】：

如果您在函数中硬编码$replacements，那么您不妨直接将其构建到您的sql 中。使用CASE 语句。

让fetch_all() 返回一个 json 编码的数组（即使它是空的）。尽可能在返回值中保持一致的数据类型是个好主意。

public function serverChatlog(): string
{
    $sql = "SELECT ID,
                   logDate,
                   ServerID,
                   logSubset,
                   logSoldierName,
                   CASE logMessage
                       WHEN 'ID_CHAT_ATTACK/DEFEND' THEN 'Attack/Defend!'
                       WHEN 'ID_CHAT_REQUEST_MEDIC' THEN 'Request Medic!'
                       WHEN 'ID_CHAT_REQUEST_AMMO'  THEN 'Request Ammo!'
                       WHEN 'ID_CHAT_REQUEST_RIDE'  THEN 'Request Ride!'
                       WHEN 'ID_CHAT_NEGATIVE'      THEN 'Negative!'
                       WHEN 'ID_CHAT_SORRY'         THEN 'Sorry!'
                       WHEN 'ID_CHAT_GOGOGO'        THEN 'Go Go Go!'
                       WHEN 'ID_CHAT_AFFIRMATIVE'   THEN 'Affirmative!'
                       WHEN 'ID_CHAT_REQUEST_ORDER' THEN 'Request Order!'
                       WHEN 'ID_CHAT_THANKS'        THEN 'Thanks!'
                       ELSE logMessage
                   END logMessage,
                   logPlayerID
            FROM `tbl_chatlog`
            ORDER BY `ID` DESC";
    return json_encode($this->connectDB()->query($sql)->fetch_all(MYSQLI_ASSOC), true);
}

看看你的方法变得多么干净、专业、直接和可读。

【讨论】：

【解决方案2】：

我希望这会有所帮助。搜索数组 key ，如果 key 存在则直接替换。

foreach ($secondArray as &$value) {
    $key = array_search ( trim($value['logMessage'], '*') , $value );
    if (!empty($key)) {
        $value['logMessage'] = $replacements[$key]
    }
}

【讨论】：

当$key 被保证被声明时，isset($key) && !empty($key) 不仅是不必要的，isset($key) && !empty($key) 是一个反模式，不应该以任何理由存在于任何人的代码中。 stackoverflow.com/a/4559976/2943403
empty() 不知道零和假之间的区别。不需要检查变量是否被声明，所以empty() 是一个糟糕的选择。

【解决方案3】：

可能类似于以下内容。抓取$replacements的键值，如果找到$array中的键值，则将其替换为$replacement值。

$array = [
        "ID" => "2179",
        "logDate" => "2016-05-12 22:10:38",
        "ServerID" => "2",
        "logSubset" => "Team",
        "logSoldierName" => "OPTIMUS-GOLD",
        "logMessage" => "ID_CHAT_REQUEST_AMMO",
        "logPlayerID" => "1071"

];
 $replacements = array(
    'ID_CHAT_ATTACK/DEFEND' => 'Attack/Defend!',
    'ID_CHAT_REQUEST_MEDIC' => 'Request Medic!',
    'ID_CHAT_REQUEST_AMMO' => 'Request Ammo!',
    'ID_CHAT_REQUEST_RIDE' => 'Request Ride!',
    'ID_CHAT_NEGATIVE' => 'Negative!',
    'ID_CHAT_SORRY' => 'Sorry!',
    'ID_CHAT_GOGOGO' => 'Go Go Go!',
    'ID_CHAT_AFFIRMATIVE' => 'Affirmative!',
    'ID_CHAT_REQUEST_ORDER' => 'Request Order!',
    'ID_CHAT_THANKS' => 'Thanks!',
);
$keys = array_keys($replacements);
foreach($array as $k => $v) {
    if(in_array($v, $keys)) {
        $array[$k] = $replacements[$v];
    }
}
print_r($array);
//PRINTS: Array ( [ID] => 2179 [logDate] => 2016-05-12 22:10:38 [ServerID] => 2 [logSubset] => Team [logSoldierName] => OPTIMUS-GOLD [logMessage] => Request Ammo! [logPlayerID] => 1071 )

编辑

所以让我将相同的逻辑应用到数组的其余部分。假设我们有以下数组（我从上面的问题中提取了这个）：

$array = [
"31" => 
    [
        "ID" => "2179",
        "logDate" => "2016-05-12 22:10:38",
        "ServerID" => "2",
        "logSubset" => "Team",
        "logSoldierName" => "OPTIMUS-GOLD",
        "logMessage" => "ID_CHAT_REQUEST_AMMO",
        "logPlayerID" => "1071"
    ],

"32" => 
    [
        "ID" => "2178",
        "logDate" => "2016-05-12 22:10:34",
        "ServerID" => "2",
        "logSubset" => "Team",
        "logSoldierName" => "CaptaineGamingFR",
        "logMessage" => "ID_CHAT_REQUEST_RIDE",
        "logPlayerID" => "1531"
    ],

"33" =>
    [
        "ID" => "2177",
        "logDate" => "2016-05-12 22:10:27",
        "ServerID" => "2",
        "logSubset" => "Team",
        "logSoldierName" => "CaptaineGamingFR",
        "logMessage" => "ID_CHAT_GOGOGO",
        "logPlayerID"  => "1531"
    ],
"34" => [
        "ID" => "2179",
        "logDate" => "2016-05-12 22:10:38",
        "ServerID" => "2",
        "logSubset" => "Team",
        "logSoldierName" => "OPTIMUS-GOLD",
        "logMessage" => "ID_CHAT_REQUEST_AMMO",
        "logPlayerID" => "1071"

   ]
];

现在我可以使用以下代码遍历这个数组：

$keys = array_keys($replacements); // Grab The Array Keys
foreach($array as $subarray => $a) { // For Each loop to pull out the subarrays
    foreach($a as $k => $v) { // another to loop through those subarrays
        if(in_array($v, $keys)) { // if the value is found as a key in the replacements array do the following
            $array[$subarray][$k] = $replacements[$v]; // replace the current subarray index value with the value in the $replacements array
        }
    }
}

这将输出以下内容：

Array
(
    [31] => Array
        (
            [ID] => 2179
            [logDate] => 2016-05-12 22:10:38
            [ServerID] => 2
            [logSubset] => Team
            [logSoldierName] => OPTIMUS-GOLD
            [logMessage] => Request Ammo!
            [logPlayerID] => 1071
        )

    [32] => Array
        (
            [ID] => 2178
            [logDate] => 2016-05-12 22:10:34
            [ServerID] => 2
            [logSubset] => Team
            [logSoldierName] => CaptaineGamingFR
            [logMessage] => Request Ride!
            [logPlayerID] => 1531
        )

    [33] => Array
        (
            [ID] => 2177
            [logDate] => 2016-05-12 22:10:27
            [ServerID] => 2
            [logSubset] => Team
            [logSoldierName] => CaptaineGamingFR
            [logMessage] => Go Go Go!
            [logPlayerID] => 1531
        )

    [34] => Array
        (
            [ID] => 2179
            [logDate] => 2016-05-12 22:10:38
            [ServerID] => 2
            [logSubset] => Team
            [logSoldierName] => OPTIMUS-GOLD
            [logMessage] => Request Ammo!
            [logPlayerID] => 1071
        )

)

【讨论】：

是的，这确实有效，但是，它只适用于一个值。例如：只有攻击/防御！将被替换。其余的将保持不变。无论如何，谢谢你的遮阳篷。我希望你现在可以帮助我:)
不应该这样。我确实注意到您使用**$command** 来描述应将命令替换为其各自的值，而我没有编写代码来解析它。但是上面的代码应该可以工作。现在您需要做的是遍历您的主数组，然后使用我提供的代码进行迭代。我将进行编辑，以便您可以看到它的实际效果。
我很感激。给你的另一件事。它在一个类里面。我不在课堂上打印结果，而是在另一个 PHP 文件中的课堂外打印。如果你愿意，我可以把全班发给你
哦，在这里你能看到我从你的 awnser 得到的当前结果。 site1.h2505194.stratoserver.net/5/test.php
没错，你可以决定要打印在哪里，我只是把它放在那里让你看到输出

【解决方案4】：

也许这会有所帮助。它遍历日志数组，检查 logMessage 元素的值并替换它。

<?php

    foreach($logs as $log){
        $replacementKey =   str_replace('*', '', $log['logMessage']);
        if(array_key_exists($replacementKey, $replacements)){
            $log['logMessage'] = $replacements[$replacementKey];
        }
    }

?>

【讨论】：