CODEWITHSUNDEEP
phpstrtotime
0plus1
0plus1

Reputation: 4555

Strange behaviour of strtotime for dates far in the future

After troubleshooting a strange error, I encountered this:

echo strtotime("2050/09/19");

returns false

Why?

Thanks!

Upvotes: 2

Views: 1047

Answers (4)

Marcelo Assis
Marcelo Assis

Reputation: 5214

The valid range of a timestamp is typically from Fri, 13 Dec 1901 20:45:54 UTC to Tue, 19 Jan 2038 03:14:07 UTC. (These are the dates that correspond to the minimum and maximum values for a 32-bit signed integer.) Additionally, not all platforms support negative timestamps, therefore your date range may be limited to no earlier than the Unix epoch. This means that e.g. dates prior to Jan 1, 1970 will not work on Windows, some Linux distributions, and a few other operating systems. PHP 5.1.0 and newer versions overcome this limitation though.

For 64-bit versions of PHP, the valid range of a timestamp is effectively infinite, as 64 bits can represent approximately 293 billion years in either direction.

Here.

Upvotes: 2

Tadeck
Tadeck

Reputation: 137440

This is because of the fact year 2050 is not in the 32-bit Unix epoch (which ends somewhere in 2038). See more on the documentation page for strtotime().

Upvotes: 3

Mat
Mat

Reputation: 206879

Looks like you don't have a 64 bit PHP. From the strtotime docs:

Note:

The valid range of a timestamp is typically from Fri, 13 Dec 1901 20:45:54 UTC to Tue, 19 Jan 2038 03:14:07 UTC. (These are the dates that correspond to the minimum and maximum values for a 32-bit signed integer.) Additionally, not all platforms support negative timestamps, therefore your date range may be limited to no earlier than the Unix epoch. This means that e.g. dates prior to Jan 1, 1970 will not work on Windows, some Linux distributions, and a few other operating systems. PHP 5.1.0 and newer versions overcome this limitation though.

For 64-bit versions of PHP, the valid range of a timestamp is effectively infinite, as 64 bits can represent approximately 293 billion years in either direction.

Upvotes: 4

liquorvicar
liquorvicar

Reputation: 6126

On a 32-bit system it can't handle dates that far in the future: strtotime

Upvotes: 3

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