获取$replacements的键值，如果找到$array中的键值，它将用$replacement的值替换该值。

$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

所以让我把同样的逻辑应用到你的数组的其余部分。假设我们有下面的数组（我从你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"

   ]
];

现在我可以用下面的代码迭代这个数组：

$keys = array_keys($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
        )

)

也许这有帮助。它迭代日志数组，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];
        }
    }

?>

如果你在你的函数中硬编码$replacements，那么你可以直接将它构建到你的SQL中。
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一个好主意。

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。
要享受更大的灵活性，创建一个新的数据库表来包含翻译，并在logMessage列上加入该数据。这样，您可以维护/扩展您的翻译数据，而无需接触您的代码库-- WIN！

我希望这对你有帮助。搜索数组的关键字，如果关键字存在，那么就用它替换。

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