PHP 获取月初月末日期

// 获取当前时间的月初月尾
 
echo date("Y-m-01", time());
echo PHP_EOL;
echo date('Y-m-t', time());
 
/* 输出
2017-09-01
2017-09-30
*/
 
 
 
// 获取上一月的月初月尾
 
echo date("Y-m-01", strtotime('-1 month'));
echo PHP_EOL;
echo date('Y-m-t', strtotime('-1 month'));
 
 
 
/* 输出
2017-08-01
2017-08-31
*/
 
 
// 获取下一月的月初月尾
 
echo date("Y-m-01", strtotime('+1 month'));
echo PHP_EOL;
echo date('Y-m-t', strtotime('+1 month'));
 
/* 输出
2017-10-01
2017-10-31
*/

https://blog.csdn.net/adorablewolf/article/details/101027257