{"id":252032,"date":"2015-04-24T11:00:05","date_gmt":"2015-04-24T11:00:05","guid":{"rendered":"https:\/\/osmosee.wordpress.com\/?p=565"},"modified":"2024-02-02T04:57:04","modified_gmt":"2024-02-02T04:57:04","slug":"using-1-month-with-strtotime-function-in-php","status":"publish","type":"post","link":"https:\/\/staging.osmosys.co\/uk\/using-1-month-with-strtotime-function-in-php\/","title":{"rendered":"Using “+\/-1 Month” with strtotime() function in PHP"},"content":{"rendered":"
<\/div>

PHP’s date function strtotime is used to parse about any English textual date-time into a Unix time-stamp.<\/p>\n

Syntax:<\/strong> int strtotime ( string $time [, int $now = time() ] );<\/p>\n

Examples:<\/strong><\/p>\n

<?php\necho strtotime(\"now\");\necho strtotime(\"+1 month\");\n?><\/pre>\n
PHP Docs<\/strong> : http:\/\/php.net\/manual\/en\/function.strtotime.php<\/a><\/p>\n
We’ve been using it in one of our projects, to get the 28th day of the last month.<\/p>\n
What we were expecting:<\/strong><\/p>\n
Assume that today’s date is: <\/strong>2014-12-31 and we wanted last month’s 28th.<\/p>\n
Our code –<\/p>\n
<?php $date = date('Y-m-28',\u0393\u00f6\u00bc\u251c\u00ed strtotime(\u256c\u00f4\u251c\u00e7\u252c\u00fa-1 month\")) ?><\/pre>\n
What do you think the $date will have? 2014-11-28 right? Wrong! It has 2014-12-28<\/p>\n
Let’s look at another example –<\/p>\n
Assume that today’s date is 2015-01-31, and we want to get the next month’s 28th.<\/p>\n
Our code –<\/p>\n
[code language=\"php\"]&amp;lt;?php $date = &amp;lt;strong&amp;gt;date('Y-m-28', strtotime(+1 month"))?&amp;gt; [\/code]<\/pre>\n
The $date will have 2015-03-28, instead of 2015-02-28 as expected.<\/p>\n
Scratching your head? We were too, but delving a little deeper into the implementation made things clearer.<\/p>\n
What’s happening?<\/strong><\/p>\n
If a month has 31 days and you are on the last day of that month, the strtotime(1 month”) returns the 1st day of that month.<\/p>\n
If you are on last day of January, the strtotime(+1 month”) returns 3rd of March(not a leap year) \/ 2nd March(leap year).<\/p>\n
Why it’s not a bug:<\/strong><\/p>\n
The current behavior is correct (in it’s own way). Let’s understand the process with an example:<\/p>\n