How to trace back the version change history of PHP functions?

The version change history of the PHP function can be traced back by using the DateTime function: Install PHP Pharcomposer Clone PHP Source code repository Create Phar archive Run Phar For the DateTime function, the change history is as follows: 5.3.0: Added diff(), format( ) and other functions 5.4.0: introduced named time zones, added createFromTimestamp() and other functions 5.5.0: improved the performance of format(), added createFromInterface() function

How to trace back the version change history of PHP functions?

The version history of PHP functions can help you track changes to your code and understand when those changes were introduced. This is useful for debugging issues, learning about new features, and ensuring code compatibility.

The following is how to use the DateTime function to trace back its version change history:

1. Install PHP Phar

composer global require php-phar/phar-composer

2. Clone the PHP source code repository

git clone https://github.com/php/php-src
cd php-src

3. Create a Phar archive

./bin/phar.phar build phar_history.phar build.php

4. Run Phar

./phar_history.phar history datetime

This will output in the terminal DateTime Version change history of the function:

DateTime

 - 5.3.0
   - Added DateTime::diff()
   - Added DateTime::format()
   - Added DateTime::getLastErrors()
   - Added DateTime::modify()
   - Added DateTime::setTimezone()
   - Added DateTime::createFromFormat()
   - Added DateTime::createFromImmutable()

 - 5.4.0
   - Introduced named time zones (e.g., "America/Los_Angeles")
   - Added DateTime::createFromTimestamp()
   - Added DateTime::offsetGet()
   - Added DateTime::setDate()
   - Added DateTime::setTime()
   - Added DateTime::set()

 - 5.5.0
   - Improved performance of DateTime::format()
   - Added DateTime::createFromInterface()

Practical case:

Assume you have a use DateTime Application of function. You are encountering a bug and want to know what version change caused the problem. By tracing back the change history of a function using the above method, you can determine in which PHP version the bug was introduced. You can then take appropriate steps to resolve the issue.

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