Define variable types, declare strict types, WordPress coding standard

[gudmdharalds]

The code needs a bit of clean up in a few areas. This issue collects these and links to the appropriate issues/pull requests which resolve these issues.

The clean up involves:

• Currently only part of the code uses strict variable types. All the code should use strict variable types, as it is safer.
• declare(strict_types=1); should be used in all files.
• All files should comply with the WordPress coding standard.

The above needs to be applied to the following files:

• ap-file-types.php [ Apply WP CS for a few files, move functionality between files #247 ]
• ap-hashes-api.php [ Apply WP CS for a few files, move functionality between files #247 ]
• ap-nonfunctional-changes.php [ Apply WP CS for a few files, move functionality between files #247 ]
• ap-svg-files.php [ Apply WP CS for a few files, move functionality between files #247 ]
• auto-approval.php [ Apply WP CS for a few files, move functionality between files #247 ]
• defines.php [ Apply WP CS for a few files, move functionality between files #247 ]
• exec.php [ Adding PHP 8.1 support and related changes #236 ]
• file-validation.php [ Apply WP CS and variable types to final files  #272 ]
• github-api.php [ Apply WP CS and variable types to final files  #272 ]
• github-commit-status.php [ Apply WP CS for a few files, move functionality between files #247 ]
• git-repo.php [ Apply WP CS and variable types to final files  #272 ]
• latest-release.php [ Apply WP CS for a few files, move functionality between files #247 ]
• lint-scan.php [ Adding PHP 8.1 support and related changes #236 ]
• main.php [ Break vipgoci_run() into multiple functions #207 ]
• misc.php [ Apply WP CS and variable types to final files  #272 ]
• options.php [ Apply WP CS and variable types to final files  #272 ]
• other-web-services.php [ Apply WP CS and variable types to final files  #272 ]
• phpcs-scan.php [ Adding PHP 8.1 support and related changes #236 ]
• requires.php [ Improve reporting to users #246 ]
• results.php [ Apply WP CS for a few files, move functionality between files #247 ]
• skip-file.php [ Apply WP CS for a few files, move functionality between files #247 ]
• statistics.php [ Apply WP CS for a few files, move functionality between files #247 ]
• support-level-label.php [ Apply WP CS for a few files, move functionality between files #247 ]
• svg-scan.php [ Adding PHP 8.1 support and related changes #236 ]
• test.bootstrap.php [ Apply WP CS for a few files, move functionality between files #247 ]
• vip-go-ci.php [ Adding PHP 8.1 support and related changes #236 ]

Unit tests are covered in #244.