输出每月的第一天和最后一天
<?php function getDateType($count, $type, $sort = 2) { $time = []; $cyear = floor(date("Y", time())); $cMonth = floor(date("m", time())); for ($i = 0; $i < $count; $i++) { $nMonth = $cMonth - $i; $cyear = $nMonth == 0 ? ($cyear - 1) : $cyear; $nMonth = $nMonth <= 0 ? 12 + $nMonth : $nMonth; $date = $cyear . "-" . $nMonth . "-1"; if ($type == 1) { $firstday = date('Y-m-01', strtotime($date)); $lastday = date('Y-m-t', strtotime($date)); @$time[$i][0] .= $firstday; @$time[$i][1] .= $lastday; } elseif ($type == 2) { $firstday = date('Y年m月', strtotime($date)); @$time[$i] .= $firstday; } } return $sort != 2 ? $time : array_reverse($time); } $a = getDateType(12, 1); var_dump($a); //输出 array (size=12) 0 => array (size=2) 0 => string '2018-07-01' (length=10) 1 => string '2018-07-31' (length=10) 1 => array (size=2) 0 => string '2018-08-01' (length=10) 1 => string '2018-08-31' (length=10) 2 => array (size=2) 0 => string '2018-09-01' (length=10) 1 => string '2018-09-30' (length=10) 3 => array (size=2) 0 => string '2018-10-01' (length=10) 1 => string '2018-10-31' (length=10) 4 => array (size=2) 0 => string '2018-11-01' (length=10) 1 => string '2018-11-30' (length=10) 5 => array (size=2) 0 => string '2018-12-01' (length=10) 1 => string '2018-12-31' (length=10) 6 => array (size=2) 0 => string '2019-01-01' (length=10) 1 => string '2019-01-31' (length=10) 7 => array (size=2) 0 => string '2019-02-01' (length=10) 1 => string '2019-02-28' (length=10) 8 => array (size=2) 0 => string '2019-03-01' (length=10) 1 => string '2019-03-31' (length=10) 9 => array (size=2) 0 => string '2019-04-01' (length=10) 1 => string '2019-04-30' (length=10) 10 => array (size=2) 0 => string '2019-05-01' (length=10) 1 => string '2019-05-31' (length=10) 11 => array (size=2) 0 => string '2019-06-01' (length=10) 1 => string '2019-06-30' (length=10)