Update PHP version table to include note about php8.1 and 5.55 and various...

Update PHP version table to include note about php8.1 and 5.55 and various updates for php end of life

docs/general/requirements.md

@@ -10,7 +10,7 @@ A recommended server environment should typically meet these guidelines:
 
 * __Operating system__: Linux
 * __CMS__: Backdrop, Drupal 7, Drupal 9, Joomla, or WordPress
-* __PHP__: 7.2, 7.3, 7.4 -- with configuration and extension requirements. Php 8 is supported from 5.40.
+* __PHP__: 7.2, 7.3, 7.4 -- with configuration and extension requirements. PHP 8.0 is supported from 5.40. PHP8.1 is supported from 5.55
 * __MySQL__: MySQL 5.7.5+ or MariaDB 10.2+ -- with configuration requirements
 
 Other environments may also meet the system requirements. The following sections present requirements more precisely.
@@ -63,14 +63,14 @@ It is also important to ensure that the same PHP extensions/modules are loaded o
 
 ### PHP Version
 
-| | CiviCRM 5.39 ESR | CiviCRM 5.x.x stable |
+| | CiviCRM 5.51 ESR | CiviCRM 5.x.x stable |
 | ---- | ---- | ---- |
-| PHP 8.1 | **incompatible** | **incompatible** as not yet confirmed to work on test matrix |
+| PHP 8.1 | **incompatible** | compatible from CiviCRM 5.55 however **not recommended** yet until the extension ecosystem catches up. |
 | PHP 8.0 | compatible however **not recommended** yet until the extension ecosystem catches up. | compatible from CiviCRM 5.39 however **not recommended** yet until the extension ecosystem catches up. |
 | PHP 7.4 | compatible and **recommended** | compatible and **recommended** |
-| PHP 7.3 | compatible and **recommended** | compatible and **recommended** |
-| PHP 7.2 | compatible and **recommended** - but see note below about resaving the SMTP password | compatible and **recommended** but see note below about resaving the SMTP password |
-| PHP 7.1 | compatible but **not recommended** due to to [PHP end-of life](http://php.net/eol.php) in Dec 2019 | **incompatible** as of 5.35.0 |
+| PHP 7.3 | compatible and **recommended** | compatible but **not recommended** due to to [PHP end-of life](http://php.net/eol.php) in Dec 2021 |
+| PHP 7.2 | compatible and **recommended** - but see note below about resaving the SMTP password | compatible but **not recommended** due to to [PHP end-of life](http://php.net/eol.php) in Dec 2020 but see note below about resaving the SMTP password |
+| PHP 7.1 | **incompatible** | **incompatible** as of 5.35.0 |
 | PHP 7.0 | **incompatible** | **incompatible** as of 5.25.0 |
 | PHP 5.6 | **incompatible** | **incompatible** |