Get last date form given date

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<?php $periode = "2020-08-01"; $periodeStart = $periode." 00:00:00"; $periodeEnd = $periode." 23:59:59"; $year = date("Y"); $lastDate = (new DateTime("$periodeStart"))->modify("last day of")->format("Y-m-d"); $periodeEnd = "$lastDate 23:59:59"; echo "$periodeStart\n"; echo "$periodeEnd\n";
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