将股票日K转换为年K的PHP代码

以下是将股票日K转换为年K的PHP代码示例：

<?php

// 股票日K数据
$dailyK = [
    ['date' => '2022-12-31', 'open' => 10, 'high' => 12, 'low' => 8, 'close' => 11],
    ['date' => '2022-12-30', 'open' => 9, 'high' => 11, 'low' => 8, 'close' => 10],
    ['date' => '2022-12-29', 'open' => 8, 'high' => 10, 'low' => 6, 'close' => 9],
    ['date' => '2022-12-28', 'open' => 6, 'high' => 9, 'low' => 5, 'close' => 8],
    ['date' => '2022-12-27', 'open' => 5, 'high' => 7, 'low' => 4, 'close' => 6],
    // 其他日K数据...
];

// 将日K数据转换为年K数据
$yearlyK = [];

$year = '';
$open = 0;
$high = 0;
$low = PHP_INT_MAX;
$close = 0;

foreach ($dailyK as $data) {
    $date = $data['date'];
    $dataYear = substr($date, 0, 4);

    // 如果年份发生变化，则将上一年的K线数据加入结果集
    if ($year && $dataYear !== $year) {
        $yearlyK[] = ['year' => $year, 'open' => $open, 'high' => $high, 'low' => $low, 'close' => $close];
        $open = 0;
        $high = 0;
        $low = PHP_INT_MAX;
        $close = 0;
    }

    if (!$year) {
        $year = $dataYear;
        $open = $data['open'];
    }

    // 记录最高价、最低价
    $high = max($high, $data['high']);
    $low = min($low, $data['low']);

    // 记录最后一个交易日的收盘价
    $close = $data['close'];
}

// 将最后一年的K线数据加入结果集
if (!empty($year)) {
    $yearlyK[] = ['year' => $year, 'open' => $open, 'high' => $high, 'low' => $low, 'close' => $close];
}

// 输出年K数据
foreach ($yearlyK as $data) {
    echo $data['year'] . ' ' . $data['open'] . ' ' . $data['high'] . ' ' . $data['low'] . ' ' . $data['close'] . "\n";
}

PHP
以上代码会把$dailyK中的日K数据转换为年K数据，并输出结果。你只需要将$dailyK替换为你所需要转换的股票日K数据即可。