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$lastDateOfNextMonth =strtotime('last day of next month') ;
$lastDay = date('d/m/Y', $lastDateOfNextMonth);
print_r($lastDay);
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date('Y-m-01', strtotime('last month'));
date('Y-m-t', strtotime('last month'));
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$first = date('Y-m-01', strtotime('last month'));
$last = date('Y-m-t', strtotime('last month'));
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$a_date = date("Y-m-d");
echo date("Y-m-t", strtotime($a_date));