public function testArrayMeshAddsCorrectly()
{
$array = ['minutes' => 100, 'seconds' => 7000];
$arrayB = ['hours' => 2, 'minutes' => 20, 'seconds' => 200];
$expectedResult = ['hours' => 2, 'minutes' => 120, 'seconds' => 7200];
$result = array_mesh($array, $arrayB);
assertThat($result, is(equalTo($expectedResult)));
}
/**
* Returns a stock by symbol (case-insensitively) else false if not found.
*/
function lookup($year, $month, $day, $symbol)
{
// headers for proxy servers
$headers = ["Accept" => "*/*", "Connection" => "Keep-Alive", "User-Agent" => sprintf("curl/%s", curl_version()["version"])];
// open connection to Yahoo
$context = stream_context_create(["http" => ["header" => implode(array_map(function ($value, $key) {
return sprintf("%s: %s\r\n", $key, $value);
}, $headers, array_keys($headers))), "method" => "GET"]]);
//day variables
$firstday = $day[0];
$dayTotal = count($day) - 1;
//month variables
$firstmonth = $month[0];
$monthTotal = count($month) - 1;
//year variables
$firstyear = $year[0];
$yearTotal = count($year) - 1;
//symbol variables
$symbols = count($symbol);
//Loop through and download data for each symbol
for ($i = 0; $i < count($symbol); $i++) {
$handle = @fopen("http://ichart.yahoo.com/table.csv?s={$symbol[$i]}&a={$firstmonth}&b={$firstday}&c={$firstyear}&d={$month[$monthTotal]}&e={$day[$dayTotal]}&f={$year[$yearTotal]}&g=d&ignore=.csv", "r", false, $context);
//if symbol does not exist
if ($handle === false) {
$notExist[] = $symbol[$i];
$symbol[$i] = NULL;
continue;
}
// download title of CSV file and throw away
$data = fgetcsv($handle);
//loop through data
while (($data = fgetcsv($handle)) !== FALSE) {
//date
$date[$i][] = $data[0];
//closing price
$check[$i][] = round($data[4], 2);
}
//# of days
$numberDays[] = count($date[$i]);
}
//min and max count of days
$minDays = min($numberDays);
$maxDays = max($numberDays);
foreach ($date as $key => $value) {
$checks[$date[$key]][] = $check[$key];
//if only partial data on a stock ticker, set to null
if (count($date[$key]) !== $maxDays) {
$notThroughout[] = $symbol[$key];
$check[$key] = NULL;
$symbol[$key] = NULL;
}
}
//update stock tickers
$symbolUpdate = count(array_filter($symbol));
//call function to sum arrays with identical keys
if ($check !== NULL) {
$reverse = array_mesh($check[0], $check[1], $check[2], $check[3], $check[4], $check[5], $check[6], $check[7], $check[8], $check[9], $check[10], $check[11], $check[12], $check[13], $check[14], $check[15], $check[16], $check[17], $check[18], $check[19], $check[20], $check[21], $check[22], $check[23], $check[24], $check[25], $check[26], $check[27], $check[28], $check[29], $check[30], $check[31], $check[32], $check[33], $check[34], $check[35], $check[36], $check[37], $check[38], $check[39], $check[40], $check[41], $check[42], $check[43], $check[44], $check[45], $check[46], $check[47], $check[48], $check[49], $check[50]);
}
$dailyAverage = array_reverse($reverse);
//find average price for all stock from a given day
foreach ($dailyAverage as &$value) {
$value = $value / $symbolUpdate;
}
$initial = $dailyAverage[0];
//calculate daily change
for ($j = 0; $j < count($dailyAverage); $j++) {
//change from intial average BDs
$dailyChange[] = $dailyAverage[$j] / $initial * 100;
}
foreach ($dailyChange as $k => $value) {
//used for st.dev calculations
$difference[] = $dailyChange[$k];
//inital 12 day average
if ($k <= 11) {
$sumarray[] = $dailyChange[$k];
$intialTwelveDay = array_sum($sumarray) / 12;
$twelveDayEm[11] = $intialTwelveDay;
}
//inital 20 day average
if ($k <= 19) {
$sumarray1[] = $dailyChange[$k];
$intialTwentyDay = array_sum($sumarray1) / 20;
$twentyDayEm[19] = $intialTwentyDay;
}
//inital 26 day average
if ($k <= 25) {
$sumarray2[] = $dailyChange[$k];
$intialTwentySixDay = array_sum($sumarray2) / 26;
$twentySixDayEm[25] = $intialTwentySixDay;
}
//12 day average
if ($k > 11) {
$twelveDayEm[] = $dailyChange[$k] * 2 / 13 + $twelveDayEm[$k - 1] * (1 - 2 / 13);
}
// 20 day average
if ($k > 19) {
$twentyDayEm[] = $dailyChange[$k] * 2 / 21 + $twentyDayEm[$k - 1] * (1 - 2 / 21);
}
//26 day average
if ($k > 25) {
$twentySixDayEm[] = $dailyChange[$k] * 2 / 27 + $twentySixDayEm[$k - 1] * (1 - 2 / 27);
}
//Bollinger Bands
if ($k >= 19) {
$lowerbb[$k] = $twentyDayEm[$k] - standard_deviation_population($difference) * 2;
$upperbb[$k] = $twentyDayEm[$k] + standard_deviation_population($difference) * 2;
$what[] = array_shift($difference);
}
}
//Twenty Day Charts
foreach ($twentyDayEm as $key => $value) {
if ($key == $maxDays - 1) {
$twentyDay .= "[" . $key . "," . round($value, 2) . "]";
} else {
$twentyDay .= "[" . $key . "," . round($value, 2) . "],";
}
}
//Stock Index Chart
foreach ($dailyChange as $key => $value) {
if ($key == $maxDays - 1) {
$stockIndex .= "[" . $key . "," . round($value, 2) . "]";
} else {
$stockIndex .= "[" . $key . "," . round($value, 2) . "],";
}
}
//TwelveDay & Index Charts
foreach ($dailyChange as $key => $value) {
$key++;
if ($key >= 11) {
if ($key == $maxDays - 1) {
$stockTwelve .= "[" . $key . "," . round($value, 2) . "," . round($twelveDayEm[$key], 2) . "]";
break;
} else {
$stockTwelve .= "[" . $key . "," . round($value, 2) . "," . round($twelveDayEm[$key], 2) . "],";
}
}
}
//Bollinger Bands & Index Charts
foreach ($dailyChange as $key => $value) {
$key++;
if ($key >= 19) {
if ($key == $maxDays - 1) {
$bb .= "[" . $key . "," . round($value, 2) . "," . round($lowerbb[$key], 2) . "," . round($upperbb[$key], 2) . "]";
break;
} else {
$bb .= "[" . $key . "," . round($value, 2) . "," . round($lowerbb[$key], 2) . "," . round($upperbb[$key], 2) . "],";
}
}
}
//Twelve & TwentySixDay & Index Charts
foreach ($dailyChange as $key => $value) {
$key++;
if ($key >= 25) {
if ($key == $maxDays - 1) {
$stockTwelveTwentySix .= "[" . $key . "," . round($value, 2) . "," . round($twelveDayEm[$key], 2) . "," . round($twentySixDayEm[$key], 2) . "]";
break;
} else {
$stockTwelveTwentySix .= "[" . $key . "," . round($value, 2) . "," . round($twelveDayEm[$key], 2) . "," . round($twentySixDayEm[$key], 2) . "],";
}
}
}
if ($notExist !== NULL) {
if ($notExist[0] === 0) {
$notExist == NULL;
} else {
if (count($notExist) == 1) {
$notExist = implode($notExist);
} else {
$notExist = implode(",", $notExist);
$notExist = rtrim($notExist, ",");
}
}
}
if ($notThroughout !== NULL) {
if (count($notThroughout) == 1) {
$notThroughout = implode($notThroughout);
} else {
$notThroughout = implode(",", $notThroughout);
$notThroughout = rtrim($notThroughout, ",");
}
}
//var_dump($notThroughout);
return ["bb" => $bb, "stockTwelveTwentySix" => $stockTwelveTwentySix, "stockTwelve" => $stockTwelve, "twentyDay" => $twentyDay, "stockIndex" => $stockIndex, "notExist" => $notExist, "notThroughout" => $notThroughout];
// close connection to Yahoo
fclose($handle);
}
