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run code in 200+ php & hhvm versions
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<?php function getTimeRange($month) { $month = str_pad($month, 2, '0', STR_PAD_LEFT); $year = $month > date('m') ? date('Y') - 1 : date('Y'); $start_date = "{$year}-{$month}-01"; $end_date = date('Y-m-d', strtotime("+1 month", strtotime($start_date))); return array( 'start_date' => $start_date, 'end_date' => $end_date ); } function getTimeRange2($month, $year = 0) { $month = str_pad($month, 2, '0', STR_PAD_LEFT); $year = ($year ? : ($month > date('m') ? date('Y') - 1 : date('Y'))); $start_date = "{$year}-{$month}-01"; $end_date = date('Y-m-d', strtotime("+1 month", strtotime($start_date))); return array('start_date'=>$start_date,'end_date'=>$end_date); } var_dump(getTimeRange(1)); var_dump(getTimeRange2(1));
based on jiXWR
Output for 5.6.0 - 7.1.7
array(2) { ["start_date"]=> string(10) "2017-01-01" ["end_date"]=> string(10) "2017-02-01" } array(2) { ["start_date"]=> string(10) "2017-01-01" ["end_date"]=> string(10) "2017-02-01" }