在php中循环多维数组并执行mysql插入（股票数据）

我有一个多维数组，我希望循环抛出并为数组中的值插入mysql数据库

我需要插入到sql查询中的数组值包括：

candles[0][complete], candles[0][volume], candles[0][mid][h], candles[0][mid][l], candles[0][mid][c]  
candles[1][complete], candles[1][volume], candles[1][mid][h], candles[1][mid][l], candles[1][mid][c] 
candles[2][complete], candles[2][volume], candles[2][mid][h], candles[2][mid][l], candles[2][mid][c] 

阵列：

$get_instruments_candles = Array
(
    [instrument] => EUR_USD
    [granularity] => H4
    [candles] => Array
        (
            [0] => Array
                (
                    [complete] => 1
                    [volume] => 4491
                    [time] => 2009-01-01T22:00:00.000000000Z
                    [bid] => Array
                        (
                            [o] => 1.40390
                            [h] => 1.40515
                            [l] => 1.39445
                            [c] => 1.39540  
                        )

                    [mid] => Array
                        (
                            [o] => 1.40440
                            [h] => 1.40565
                            [l] => 1.39470
                            [c] => 1.39565
                        )

                    [ask] => Array
                        (
                            [o] => 1.40490
                            [h] => 1.40615
                            [l] => 1.39495
                            [c] => 1.39590
                        )

                )

            [1] => Array
                (
                    [complete] => 1
                    [volume] => 6866
                    [time] => 2009-01-02T02:00:00.000000000Z
                    [bid] => Array
                        (
                            [o] => 1.39545
                            [h] => 1.39690
                            [l] => 1.38447
                            [c] => 1.38641
                        )

                    [mid] => Array
                        (
                            [o] => 1.39570
                            [h] => 1.39715
                            [l] => 1.38472
                            [c] => 1.38666
                        )

                    [ask] => Array
                        (
                            [o] => 1.39595
                            [h] => 1.39740
                            [l] => 1.38497
                            [c] => 1.38691
                        )

                )

            [2] => Array
                (
                    [complete] => 1
                    [volume] => 12529
                    [time] => 2009-01-02T06:00:00.000000000Z
                    [bid] => Array
                        (
                            [o] => 1.38635
                            [h] => 1.39679
                            [l] => 1.38391
                            [c] => 1.39471
                        )

                    [mid] => Array
                        (
                            [o] => 1.38660
                            [h] => 1.39688
                            [l] => 1.38400
                            [c] => 1.39480
                        )

                    [ask] => Array
                        (
                            [o] => 1.38685
                            [h] => 1.39697
                            [l] => 1.38409
                            [c] => 1.39489
                        )

                )

        )

 )

这个数组最多可以由5000个candle[]值组成，因此我需要找到在php中执行foreach或while循环的最佳方法来运行数组值并执行MySQL插入

// connect to mysql database

// Do a loop to create and insert the values into database    

// Create sql Query to insert. [0] would be changed to arrays value 0,1,2,3,etc

$sql = "INSERT INTO table (complete, volume, high, low, close) 
VALUES ('{candles[0][complete]}','{candles[0][volume]}','{candles[0][mid][h]}','{candles[0][mid][l]}','{candles[0][mid][c]}')";

---

您可以使用

foreach

循环，然后引用循环的当前元素。最好使用事先准备好的声明。以下是PDO版本：

$stmt = $link->prepare("INSERT INTO table (complete, volume, high, low, close) 
                        VALUES (:complete, :volume, :high, :low, :close)";
$stmt->bindParam(':complete', $complete);
$stmt->bindParam(':volumn', $volume);
$stmt->bindParam(':high', $high);
$stmt->bindParam(':low', $low);
$stmt->bindParam(':close', $close);

foreach ($get_instrument_candles['candles'] as $candle) {
    $complete = $candle['complete'];
    $volume = $candle['volume'];
    $high = $candle['mid']['h'];
    $low = $candle['mid']['l'];
    $close = $candle['mid']['c'];
    $stmt->execute();
}

mysqli版本如下所示：

$complete = $volume = $high = $low = $close = null;
$stmt = $link->prepare("INSERT INTO table (complete, volume, high, low, close) 
                        VALUES (?, ?, ?, ?, ?)";
$stmt->bind_param("iiiii", $complete, $volume, $high, $low, $close);

$sql = "INSERT INTO table (complete, volume, high, low, close) VALUES ";
foreach ($get_instrument_candles['candles'] as $candle) {
   $sql .= "({$candle['complete']}, {$candle['volume']}, {$candle['mid']['h']}, {$candle['mid']['l']}, {$candle['mid']['c']}),";
}
// strip the trailing comma
$sql = substr($sql, 0, -1);

---

foreach

循环与PDO相同。

您可以使用

foreach

循环，然后引用循环的当前元素。最好使用事先准备好的声明。以下是PDO版本：

$stmt = $link->prepare("INSERT INTO table (complete, volume, high, low, close) 
                        VALUES (:complete, :volume, :high, :low, :close)";
$stmt->bindParam(':complete', $complete);
$stmt->bindParam(':volumn', $volume);
$stmt->bindParam(':high', $high);
$stmt->bindParam(':low', $low);
$stmt->bindParam(':close', $close);

foreach ($get_instrument_candles['candles'] as $candle) {
    $complete = $candle['complete'];
    $volume = $candle['volume'];
    $high = $candle['mid']['h'];
    $low = $candle['mid']['l'];
    $close = $candle['mid']['c'];
    $stmt->execute();
}

mysqli版本如下所示：

$complete = $volume = $high = $low = $close = null;
$stmt = $link->prepare("INSERT INTO table (complete, volume, high, low, close) 
                        VALUES (?, ?, ?, ?, ?)";
$stmt->bind_param("iiiii", $complete, $volume, $high, $low, $close);

$sql = "INSERT INTO table (complete, volume, high, low, close) VALUES ";
foreach ($get_instrument_candles['candles'] as $candle) {
   $sql .= "({$candle['complete']}, {$candle['volume']}, {$candle['mid']['h']}, {$candle['mid']['l']}, {$candle['mid']['c']}),";
}
// strip the trailing comma
$sql = substr($sql, 0, -1);

foreach

循环与PDO相同。

另一种方法（假设您信任输入数据）是生成单个大的

INSERT

查询。最长的查询大小（设置为，MySQL<8.0.2的默认值为4MB）应该足以插入5000个蜡烛的数据。所以代码看起来像：

$complete = $volume = $high = $low = $close = null;
$stmt = $link->prepare("INSERT INTO table (complete, volume, high, low, close) 
                        VALUES (?, ?, ?, ?, ?)";
$stmt->bind_param("iiiii", $complete, $volume, $high, $low, $close);

$sql = "INSERT INTO table (complete, volume, high, low, close) VALUES ";
foreach ($get_instrument_candles['candles'] as $candle) {
   $sql .= "({$candle['complete']}, {$candle['volume']}, {$candle['mid']['h']}, {$candle['mid']['l']}, {$candle['mid']['c']}),";
}
// strip the trailing comma
$sql = substr($sql, 0, -1);

如果您不能确定输入数据是否安全，则@Barmar的预处理语句方法是可行的。

另一种方法（假设您信任输入数据）是生成一个大的

INSERT

查询。最长的查询大小（设置为，MySQL<8.0.2的默认值为4MB）应该足以插入5000个蜡烛的数据。所以代码看起来像：

$complete = $volume = $high = $low = $close = null;
$stmt = $link->prepare("INSERT INTO table (complete, volume, high, low, close) 
                        VALUES (?, ?, ?, ?, ?)";
$stmt->bind_param("iiiii", $complete, $volume, $high, $low, $close);

$sql = "INSERT INTO table (complete, volume, high, low, close) VALUES ";
foreach ($get_instrument_candles['candles'] as $candle) {
   $sql .= "({$candle['complete']}, {$candle['volume']}, {$candle['mid']['h']}, {$candle['mid']['l']}, {$candle['mid']['c']}),";
}
// strip the trailing comma
$sql = substr($sql, 0, -1);

---

如果您不能确定输入数据是否安全，@Barmar的预处理语句方法是正确的。

如果您将占位符名称与关联数组的结构对齐，您可以直接执行（

execute（）

。@tadman它看起来像来自公共API的响应，因此，他可能对结构没有太多控制权。没错，不过如果这可以依赖，那就太好了。感谢您的快速回复，这确实解决了访问数组的问题。如果您将占位符名称与关联数组的结构对齐，您可以只执行

execute（）

直接反对。@tadman它看起来像是来自公共API的响应，因此他可能对结构没有太多控制权。没错，不过如果可以依赖它，那就太好了。感谢您的快速回复，这确实解决了访问ArrayId的问题。这些答案之一解决了您的问题？如果是，请将答案标记为已接受（向上/向下投票箭头下方的绿色箭头）。否则，您可以提供更多信息来帮助解决问题。看看这些答案中有没有一个解决了你的问题？如果是，请标记接受的答案（上/下投票箭头下方的绿色箭头）。否则，您可以提供更多信息来帮助解决问题。看看api数组是安全的，所以像你提到的那样进行插入是一个很好的选择，如果数据已经存储，我必须做一些检查，然后，只需像您提到的那样进行附加如果您在数据上有一个唯一的键，那么您可以使用

插入忽略

，而不用担心检查它是否已经存储。api数组是安全的，所以像您提到的那样进行插入是一个不错的选择，如果数据已经存储，我必须进行一些检查，然后，如您所述，只需添加数据，如果数据上有唯一的键，则只需使用

INSERT IGNORE

，而无需检查数据是否已存储。