How Can I Correctly Add Days to a Date in PHP Using `strtotime` and `date`?

Determining the Date with Number of Days Offset

This question pertains to modifying a date by adding a specified number of days to the current date. However, the provided code yields an unexpected numerical result instead of the desired date.

The Solution

The code that addresses this issue is:

echo date('Y-m-d', strtotime("+30 days"));

Explanation

The function strtotime expects a string in US English date format and parses it into a Unix timestamp, which represents the number of seconds since a specific point in time (January 1, 1970). The expression " 30 days" indicates that 30 days should be added to the current time.

In contrast, the date function formats the timestamp according to the specified format string. In this case, 'Y-m-d' represents the format for the output date.

Error Analysis

The original code utilized strtotime to modify the current date string by appending " $i days" to it. However, this approach was incorrect because strtotime requires a specific date format, not a string representing a date.

Additional Resources

Refer to the following manual pages for further information:

• strtotime: http://www.php.net/manual/en/function.strtotime.php
• date: http://www.php.net/manual/en/function.date.php

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