Support PHP 8.1 and PHP 8.2

[bobbingwide]

PHP 7.3 is going out of support - End of Life (EOL) - on 6 Dec 2021
PHP 7.4 active support is until midnight tonight. Security Support ( ie EOL ) is 28 Nov 2022
PHP 8.0 End of life is: 2023-11-26
PHP 8.1 was released on 25 Nov 2021. EOL is 25 Nov 2024

oik-shortcodes produces a number of Deprecated messages with PHP 8.0 such as:

Deprecated: Required parameter $component_slug follows optional parameter $file in C:\apache\htdocs\wordpress\wp-content\plugins\oik-shortcodes\classes\oik-listapis2.php on line 77

Warning: Trying to access array offset on value of type null in C:\apache\htdocs\wordpress\wp-content\plugins\oik-shortcodes\admin\oik-files.php on line 84

Notice: WP_Block_Type_Registry::register was called incorrectly. Block type "oiksp/squeeze" is already registered. Please see Debugging in WordPress for more information. (This message was added in version 5.0.0.) in C:\apache\htdocs\oikcom\wp-includes\functions.php on line 5663

Which of these are problems associated with PHP 8?
Investigate and fix

[bobbingwide]

Deprecated: Creation of dynamic property oiksc_404_handler::$handlers is deprecated in C:\apache\htdocs\wordpress\wp-content\plugins\oik-shortcodes\classes\class-oiksc-404-handler.php on line 126

[bobbingwide]

Update code to run without problems in PHP 8.1 and 8.2

See bobbingwide/bobbingwide#103

[bobbingwide]

Deprecated: ltrim(): Passing null to parameter #1 ($string) of type string is deprecated in C:\apache\htdocs\wordpress\wp-content\plugins\oik-shortcodes\shortcodes\oik-api-importer.php on line 53

Deprecated: substr(): Passing null to parameter #1 ($string) of type string is deprecated in C:\apache\htdocs\wordpress\wp-content\plugins\oik-shortcodes\shortcodes\oik-api-importer.php on line 187

Deprecated: Creation of dynamic property oiksc_parsed_source::$latest_md5_hash is deprecated in C:\apache\htdocs\wordpress\wp-content\plugins\oik-shortcodes\classes\class-oiksc-parsed-source.php on line 84

[bobbingwide]

Message found in oik-plugins.co.uk debug.log

04-Dec-2023 10:35:01 UTC] PHP Deprecated:  preg_replace(): 
Passing null to parameter #3 ($subject) of type array|string is deprecated 
in /home/customer/www/oik-plugins.co.uk/public_html/wp-content/plugins/oik-shortcodes/classes/oik-docblock.php on line 123