Plus 1 Month to a Date

Something to aware with, if you are using this method to plus 1 month to a date,

make sure your initial date is not the last day of the month.

For example: if the initial date is 2018-03-31,

when the system plus 1 month, the system will return 2018-04-31, when it is not a valid date,

then it will change it to 2018-05-01.

Advice is to use the initial date with the day as 1.

Sample Code A:

$selectdate = '2018-03-31';

echo "First date is 2018-03-31"."<br>";

for ($x=0; $x<=5; $x++){

$selectdate = date("Y-m-d",strtotime($selectdate.' +1 months'));

echo $selectdate.' <br>';

}

Result for A:

First date is 2018-03-31

2018-05-01

2018-06-01

2018-07-01

2018-08-01

2018-09-01

2018-10-01

Sample Code B:

$selectdate = '2018-03-01';

echo "First date is 2018-03-01"."<br>";

for ($x=0; $x<=5; $x++){

$selectdate = date("Y-m-d",strtotime($selectdate.' +1 months'));

echo $selectdate.' <br>';

}

Result for B:

First date is 2018-03-01

2018-04-01

2018-05-01

2018-06-01

2018-07-01

2018-08-01

2018-09-01