Call to undefined function PHP81_BC\strftime()

[filippodona]

Hi, Kamil I stumbled upon your repository because I'm looking for a way to make my project made in CakePHP2 work on PHP 8.
I followed all the documentation, the project is perfectly working on PHP 7.4, however updating the cakephp dependency using yours I continue to get this error Call to undefined function PHP81_BC\strftime(). In the documentation you write the following "In order to get rid of strftime() deprecation notices, it's required to switch to IntlDateFormatter class. This class is available in intl extension. Fork doesn't require it explicitly but to be able to use its functions Symfony ICU Polyfill is installed. To provide strftime behavior compatibility, PHP81_BC\strftime is used. PHP81_BC doesn't fully cover strftime, your code should work but there is a chance you'll get slightly different results." however I can't understand what exactly I have to do. Should I change my code and replace $this->Time->format with another syntax? Should I change some configuration? Would you be so kind as to help me? Also, could you tell me up to which PHP version your project is compatible (8.1, 8.2, 8.3)?
Thank you

[kamilwylegala]

Hi Filippo,

Thanks for reporting this. It's a breaking change introduced in fork. Fork now relies on Intl extension. But you made me realize that Int is not optional, it's mandatory due to PHP81_BS/strftime package 🙈

So PHP version on your server must have php-intl installed. If your project is managed by composer, when switching to this fork, composer will install all necessary dependencies. Composer is a must have. Does your project use composer to manage deps?

strftime was removed in PHP8.1, if your application code relies on it, it will use underneath the pollyfill lib (the one mentioned in issue title).

Mine project runs on PHP 8.3 and is using this fork. No problems. Although, since I'm trying to get rid of cakephp2 dependency, I'm not using many features.

Let me know if it answers your questions.

[filippodona]

Hi Kamil, thanks for taking the time to answer my questions.
I confirm that my project uses Composer to manage dependencies so I should have everything I need; if I understand correctly the only thing I'm missing is the installation and activation of the Intl extension, right? Do I have to install it at server level?

[pbarabe]

Hi @filippodona,

I believe you do need to install it at the host/server level.

On Debian-based systems (eg. Ubuntu), you'd need to run:

sudo apt install php-intl

On Redhat-based systems:

sudo yum install php-intl

Hope that helps!

[filippodona]

Hi Patrick, thank you very much for your contribution.
I am currently testing everything in a DDEV environment; I have installed the Intl extension (I see it correctly in the PHP extension list) however I continue to get the error.
Below I leave you some information

This is my composer.json
{ "require": { "cakephp/cakephp": "dev-master as 2.10.24", "cakephp/debug_kit": "^2.2.0" }, "require-dev": { "friendsofphp/php-cs-fixer": "^3.13" }, "config": { "vendor-dir": "Vendor", "allow-plugins": { "composer/installers": true } }, "repositories": [ { "type": "vcs", "url": "https://github.com/kamilwylegala/cakephp2-php8" } ] }

This is my configuration

[filippodona]

The message appears when this statement is used in a controller:
<?php echo $this->Time->format($client[$modelClass]['created'], '%d/%m/%Y %H:%M:%S'); ?>

[kamilwylegala]

@filippodona Make sure also that all dependencies required by fork are installed. Please provide error call stack + list of composer dependencies that are actually installed in your project.

[filippodona]

Hi Kamil, this is the error stack

This is my composer.lock with all dependences installed (I rename it due to upload extensions restrictions)
composer.lock.json

[kamilwylegala]

Composer has a command that outputs all installed dependencies with their version.

[filippodona]

This is the composer show command oputput:
cakephp/cakephp dev-master cb3382f The CakePHP framework
cakephp/debug_kit 2.2.9 CakePHP Debug Kit
clue/ndjson-react 1.3.0 Streaming newline-delimited JSON (NDJSON) parser and encoder for ReactPHP.
composer/installers 1.12.0 A multi-framework Composer library installer
composer/pcre 3.3.1 PCRE wrapping library that offers type-safe preg_* replacements.
composer/semver 3.4.3 Semver library that offers utilities, version constraint parsing and validation.
composer/xdebug-handler 3.0.5 Restarts a process without Xdebug.
evenement/evenement 3.0.2 Événement is a very simple event dispatching library for PHP
fidry/cpu-core-counter 1.2.0 Tiny utility to get the number of CPU cores.
friendsofphp/php-cs-fixer 3.64.0 A tool to automatically fix PHP code style
php81_bc/strftime 0.7.5 Locale-formatted strftime using IntlDateFormatter (PHP 8.1 compatible)
psr/container 2.0.2 Common Container Interface (PHP FIG PSR-11)
psr/event-dispatcher 1.0.0 Standard interfaces for event handling.
psr/log 3.0.2 Common interface for logging libraries
react/cache 1.2.0 Async, Promise-based cache interface for ReactPHP
react/child-process 0.6.5 Event-driven library for executing child processes with ReactPHP.
react/dns 1.13.0 Async DNS resolver for ReactPHP
react/event-loop 1.5.0 ReactPHP's core reactor event loop that libraries can use for evented I/O.
react/promise 3.2.0 A lightweight implementation of CommonJS Promises/A for PHP
react/socket 1.16.0 Async, streaming plaintext TCP/IP and secure TLS socket server and client connections for ReactPHP
react/stream 1.4.0 Event-driven readable and writable streams for non-blocking I/O in ReactPHP
sebastian/diff 5.1.1 Diff implementation
symfony/console 6.4.12 Eases the creation of beautiful and testable command line interfaces
symfony/deprecation-contracts 3.5.0 A generic function and convention to trigger deprecation notices
symfony/event-dispatcher 6.4.8 Provides tools that allow your application components to communicate with each other by dispatching events and listenin...
symfony/event-dispatcher-contracts 3.5.0 Generic abstractions related to dispatching event
symfony/filesystem 6.4.12 Provides basic utilities for the filesystem
symfony/finder 6.4.11 Finds files and directories via an intuitive fluent interface
symfony/options-resolver 6.4.8 Provides an improved replacement for the array_replace PHP function
symfony/polyfill-ctype 1.31.0 Symfony polyfill for ctype functions
symfony/polyfill-intl-grapheme 1.31.0 Symfony polyfill for intl's grapheme_* functions
symfony/polyfill-intl-icu 1.31.0 Symfony polyfill for intl's ICU-related data and classes
symfony/polyfill-intl-normalizer 1.31.0 Symfony polyfill for intl's Normalizer class and related functions
symfony/polyfill-mbstring 1.31.0 Symfony polyfill for the Mbstring extension
symfony/polyfill-php80 1.31.0 Symfony polyfill backporting some PHP 8.0+ features to lower PHP versions
symfony/polyfill-php81 1.31.0 Symfony polyfill backporting some PHP 8.1+ features to lower PHP versions
symfony/process 6.4.12 Executes commands in sub-processes
symfony/service-contracts 3.5.0 Generic abstractions related to writing services
symfony/stopwatch 6.4.8 Provides a way to profile code
symfony/string 6.4.12 Provides an object-oriented API to strings and deals with bytes, UTF-8 code points and grapheme clusters in a unified way

[kamilwylegala]

Looks good, so the package is there.

Try to isolate the problem, and e.g. write a tiny script that loads autoload.php from composer and runs strftime to see if the function is available or not.

[filippodona]

I did some tests following your instructions.

This simple code inserted inside the view pages/home.ctp...
<?php echo strftime ("%A"); ?>
...works perfectly as you can see from the screenshot below so this is good news

The problem persists when I use the following helper in a view:
<?php echo $this->Time->format('2024-10-04 11:53:00', '%B %e, %Y %H:%M %p'); ?>

There is probably something wrong with the CakeTime class

I made a very stupid test by modifying the _strftime function of the CakeTime class like this:
`protected static function _strftime($format, $timestamp) {
$format = PHP81_BC\strftime($format, $timestamp);

	$encoding = Configure::read('App.encoding');
	if (!empty($encoding) && $encoding === 'UTF-8') {
		if (function_exists('mb_check_encoding')) {
			$valid = mb_check_encoding($format, $encoding);
		} else {
			$valid = Multibyte::checkMultibyte($format);
		}
		if (!$valid) {
			$format = mb_convert_encoding($format, 'UTF-8', 'ISO-8859-1');
		}
	}
	return $format;
}`

...to this:
` protected static function _strftime($format, $timestamp) {
$format = strftime($format, $timestamp);

	$encoding = Configure::read('App.encoding');
	if (!empty($encoding) && $encoding === 'UTF-8') {
		if (function_exists('mb_check_encoding')) {
			$valid = mb_check_encoding($format, $encoding);
		} else {
			$valid = Multibyte::checkMultibyte($format);
		}
		if (!$valid) {
			$format = mb_convert_encoding($format, 'UTF-8', 'ISO-8859-1');
		}
	}
	return $format;
}`

..and not it works

However, I am not convinced that this is the most correct solution.

[filippodona]

Could this be a PHP81_BC namespace issue?

[kamilwylegala]

If you run in your project PHP_81\strftime() directly, does it work? Please run it anywhere in controller class.

I wonder if it's composer class mapping issue.

[filippodona]

I alway got Call to undefined function PHP_81\strftime()

In the autoload_static.php file there is no references to the PHP_81\strftime function. Could be a problem with the second level deps ?

[kitgrose]

I had the same issue (apparently caused by my composer.json having its vendor-dir set to app/Vendor), and fixed it by manually adding the Composer autoload file to my ${APP}/Config/bootstrap.php file:

require APP . 'Vendor' . DS . 'autoload.php';

[filippodona]

amazing @kitgrose your suggestion works fine!

I have your same configuration (vendor-dir set to app/Vendor).