FormHelper migration strftime to Intl.

README.md

@@ -34,7 +34,7 @@ Here are steps I took to migrate my project through all versions to PHP 8.1, may
 
 ### Breaking changes
 
-- 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 requires `intl` extension to be enabled in PHP configuration. If you don't have `intl` extension, installing fork will result in error. Discussed (here)[https://github.com/kamilwylegala/cakephp2-php8/pull/64] and (here)[https://github.com/kamilwylegala/cakephp2-php8/issues/65].
+- 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. Discussed (here)[https://github.com/kamilwylegala/cakephp2-php8/pull/64] and (here)[https://github.com/kamilwylegala/cakephp2-php8/issues/65].
 
 ## Installation
 

composer.json

@@ -26,7 +26,7 @@
 	"suggest": {
 		"ext-openssl": "You need to install ext-openssl or ext-mcrypt to use AES-256 encryption",
 		"ext-mcrypt": "You need to install ext-openssl or ext-mcrypt to use AES-256 encryption",
-		"ext-intl": "Required to use IntlDateFormatter instead of strftime"
+		"ext-intl": "Required to use IntlDateFormatter instead of strftime, if not Symfony polyfill will be used."
 	},
 	"require-dev": {
 		"phpunit/phpunit": "^9.5",

lib/Cake/View/Helper/FormHelper.php

@@ -2767,9 +2767,7 @@ protected function _getDateTimeValue($value, $timeFormat) {
 		}
 
 		if (is_numeric($value)) {
-			// @codingStandardsIgnoreStart
-			$value = @strftime('%Y-%m-%d %H:%M:%S', $value);
-			// @codingStandardsIgnoreEnd
+			$value = PHP81_BC\strftime('%Y-%m-%d %H:%M:%S', $value);
 		}
 		$meridian = 'am';
 		$pos = strpos($value, '-');
@@ -3024,7 +3022,7 @@ protected function _generateOptions($name, $options = array()) {
 				} else {
 					for ($m = 1; $m <= 12; $m++) {
 						// @codingStandardsIgnoreStart
-						$data[sprintf("%02s", $m)] = @strftime("%m", mktime(1, 1, 1, $m, 1, 1999));
+						$data[sprintf("%02s", $m)] = PHP81_BC\strftime("%m", mktime(1, 1, 1, $m, 1, 1999));
 						// @codingStandardsIgnoreEnd
 					}
 				}