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@ 2018-02-28T12:15:24Z

<?php

$xml = "<root>
    <quoteDay>
      <date>2018-02-26</date>
      <close>1586,96</close>
    </quoteDay>
    <quoteDay>
      <date>2018-02-23</date>
      <close>1577,11</close>
    </quoteDay>
    <quoteDay>
      <date>2018-02-22</date>
      <close>1565,5</close>
    </quoteDay>
</root>";
$xml = simplexml_load_string($xml) or die("Error: Cannot create object");
$id = 0;
$daysInMovingMean = 3;
foreach ($xml->quoteDay as $quoteDay) {
	echo "Moving average for ".$quoteDay->date.":".PHP_EOL;
	$current = (float) str_replace(",", ".", $quoteDay->close);
	$sum = 0;
	for ($days = 0; $days < $daysInMovingMean; $days++) { 
		if (!$xml->quoteDay[$id + $days]) break;
		$sum += (float) str_replace(",", ".", $xml->quoteDay[$id + $days]->close);
	}
	$sumovingMean = $sum / $days;
	echo $sumovingMean.PHP_EOL;
	echo PHP_EOL;
	$id++;
}

Output for git.master, git.master_jit, rfc.property-hooks: Moving average for 2018-02-26: 1576.5233333333 Moving average for 2018-02-23: 1571.305 Moving average for 2018-02-22: 1565.5

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2022-12-01 RFC: Property hooks - included in PHP 8.4
2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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