mrudel / php-timecop

A PHP extension providing "time travel" capabilities inspired by ruby timecop gem

php-timecop

DESCRIPTION

A PHP extension providing "time travel" and "time freezing" capabilities, inspired by ruby timecop gem.

INSTALL

git clone https://github.com/hnw/php-timecop.git
cd php-timecop
phpize
./configure
make
make install

After install, add these lines to your php.ini

extension=timecop.so

SYSTEM REQUIREMENTS

• OS: Linux, macOS
• PHP: 5.3.1 - 7.1.x (might work on 5.2.x and 5.3.0, but not tested enough)
• SAPI: Apache, CLI
  • Other SAPIs are not tested, but there is no SAPI-dependent code.
• non-ZTS(recommended), ZTS

FEATURES

• Freeze time to a specific point.
• Travel back to a specific point in time, but allow time to continue moving forward from there.
• Scale time by a given scaling factor that will cause time to move at an accelerated pace.
• Override the following PHP stock functions and methods, which supports freezing or traveling time.
  • time()
  • mktime()
  • gmmktime()
  • date()
  • gmdate()
  • idate()
  • getdate()
  • localtime()
  • strtotime()
  • strftime()
  • gmstrftime()
  • microtime()
  • gettimeofday()
  • unixtojd()
  • DateTime::_construct()
  • DateTime::createFromFormat() (PHP >= 5.3.0)
  • DateTimeImmutable::_construct() (PHP >= 5.5.0)
  • DateTimeImmutable::createFromFormat() (PHP >= 5.5.0)
  • date_create()
  • date_create_from_format() (PHP >= 5.3.0)
  • date_create_immutable() (PHP >= 5.5.0)
  • date_create_immutable_from_format() (PHP >= 5.5.0)
• Rewrite value of the following global variables when the time has been moved.
  • $_SERVER['REQUEST_TIME']

USAGE

<?php
var_dump(date("Y-m-d")); // todays date
timecop_freeze(0);
var_dump(gmdate("Y-m-d H:i:s")); // string(19) "1970-01-01 00:00:00"
var_dump(strtotime("+100000 sec")); // int(100000)

The difference between timecop_freeze() and timecop_travel()

timecop_freeze() is used to statically mock the concept of now. As your program executes, time() will not change unless you make subsequent calls to timecop_freeze/travel/scale/return. timecop_travel(), on the other hand, computes an offset between what we currently think time() is and the time passed in. It uses this offset to simulate the passage of time. To demonstrate, consider the following code snippets:

<?php
$new_time = mktime(12, 0, 0, 9, 1, 2008);
timecop_freeze($new_time);
sleep(10);
var_dump($new_time == time()); // bool(true)

timecop_return(); // "turn off" php-timecop

timecop_travel($new_time);
sleep(10);
var_dump($new_time == time()); // bool(false)

Timecop Scale

timecop_scale($scaling_factor) make time move at an accelerated pace. With this function, you can emulate long-span integration test and reduce execution time of time-dependent unit test.

<?php
Timecop::freeze(new DateTime("2017-01-01 00:00:00"));
Timecop::scale(50); // time goes x50 faster
usleep(100000); // 100ms
var_dump((new DateTime())->format("c")); // string(25) "2017-01-01T00:00:05+00:00"

CHANGELOG

version 1.2.3(beta), 2017/1/8

• Fix timecop_date_create_from_format(): support time travelling
  • Now portions of the generated time not provided in format will be set to the travelled time
  • The previous version is completely same behavior as date_create_from_format().
• Remove TimecopDateTime::getTimestamp(), TimecopDateTime::setTimestamp() on PHP 5.2.x

version 1.2.2(alpha), 2017/1/4

• Implement TimecopDateTimeImmutable class and timecop_date_create_immutable(), timecop_date_create_immutable_from_format() functions.
• Now timecop_date_create_from_format() returns DateTime instance

version 1.2.0(alpha), 2016/12/30

• Big internal change (without BC break): handle microseconds accurately in time traveling.
• Now timecop_freeze() and timecop_travel() accepts either DateTimeInterface or int.
  • With DateTimeInterface argument, freezed/traveled time would have fraction of second.
• Implement timecop_scale(): Make time go faster.
• Implement Timecop::***() as alias of timecop_***(). (For freeze, travel, return, scale)

version 1.1.3, 2016/12/27

• Fix crash when non-object passed as 2nd argument of TimecopDateTime::__construct() (Fix #9)'
• Add CI environment (CentOS, Ubuntu 32-bit, PHP 7.1)

version 1.1.2(alpha), 2016/04/23

• Fix for stock PHP on Ubuntu

version 1.1.0(alpha), 2016/04/18

• Support PHP 7.0.x
• Now new DateTime() always returns DateTime instance
  • The previous version returns TimecopDateTime instance when timecop.func_override=1.
• Implement timecop_gettimeofday() and timecop_microtime()

version 1.0.6, 2016/04/15

• Fix #10 (Timecop segfaults when set_error_handler throws an exception)

version 1.0.5, 2013/11/26

• Fix TimecopDateTime::createFromFormat() to reutrn TimecopDateTime instance on PHP >= 5.3.4
  • The previous version returns DateTime instance
  • Implement identical function timecop_date_create_from_format()
  • BUG: not supporting "relative formats" for this method currently.
• Fix behavior of TimecopDateTime::_construct() when its 2nd argument is specified.

version 1.0.4, 2013/03/11

• Fix SIGSEGV in TimecopDateTime::__construct() called with NULL as 1st argument

version 1.0.3, 2013/03/09

• Fix the time traveling implementation for TimecopDateTime::__construct()
• Fix timecop_date_create() to return TimecopDateTime instance
  • The previous version returns DateTime instance
• Add TimecopDateTime::getTimestamp(), TimecopDateTime::setTimestamp() only for PHP 5.2.x

version 1.0.2, 2013/03/06

• Implement timecop_date_create()

Version 1.0.1, 2013/03/04

• Implement time traveling feature for TimecopDateTime::__construct() with 1 or 2 arguments
  • The previous version works correctly only for no arguments calling: "new TimecopDateTime()"

version 1.0.0, 2012/11/21

• Fix memory leak

version 0.0.1, 2012/06/19

• Initial Release

LICENSE

The MIT License

Copyright (c) 2012-2017 Yoshio HANAWA

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.