我有一个多维数组，我希望循环抛出并为数组中的值执行 mysql 数据库插入。
我需要插入到 sql 查询中的数组值是：
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]
数组：
$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 个蜡烛 [] 值组成，所以我需要找到在 php 中执行 foreach 或 while 循环的最佳方法来运行抛出数组值并执行 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。最好使用准备好的语句。这是 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);
该foreach循环是一样的PDO。
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