Automatic PHP 7 Compatibility Checking Using php7cc (and PHPCompatibility)
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The document discusses automatic compatibility checking for PHP 7 using the php7cc and PHPCompatibility tools. It provides an overview of why upgrading to PHP 7 is important for performance, security and new features. It then demonstrates how to use the php7cc and PHPCompatibility tools to identify compatibility issues, including various configuration options. Common issues that can be missed by static analysis like test coverage are also discussed. An analysis of a PHP codebase found errors and warnings using both tools.
![W H Y U P G R A D E T O P H P 7
• Removed
- #2 $HTTP_RAW_POST_DATA
- $GLOBALS[‘HTTP_RAW_POST_DATA']](https://image.slidesharecdn.com/php7cc-180216110542/85/Automatic-PHP-7-Compatibility-Checking-Using-php7cc-and-PHPCompatibility-21-320.jpg)
![P H P C O M PAT I B I L I T Y
• PHPCompatibility
- Option: -a
- Interactive mode
- phpcs --standard=PHPCompatibility -a src/
SwitchMultiDefault
- <ENTER> to recheck, [s] to skip or [q] to quit :](https://image.slidesharecdn.com/php7cc-180216110542/85/Automatic-PHP-7-Compatibility-Checking-Using-php7cc-and-PHPCompatibility-56-320.jpg)
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Automatic PHP 7 Compatibility Checking Using php7cc (and PHPCompatibility)
- 1. A U T O M AT I C P H P 7 C O M PAT I B I L I T Y C H E C K I N G U S I N G P H P 7 C C ( A N D P H P C O M PAT I B I L I T Y ) M A R K N I E B E R G A L L https://joind.in/talk/6e322 https://github.com/mbniebergall/php7-incompatible
- 2. A B O U T M A R K N I E B E R G A L L • PHP since 2005 • Masters degree in MIS • Senior Software Engineer • Drug screening project • President of Utah PHP User Group (UPHPU) • SSCP, CSSLP Certified and SME for (ISC)2 • Drones, fishing, skiing, father, husband
- 3. A B O U T M A R K N I E B E R G A L L • Manchester • Nelson • Workington
- 4. A B O U T M A R K N I E B E R G A L L
- 5. A B O U T M A R K N I E B E R G A L L
- 6. A U T O M AT I C P H P 7 C O M PAT I B I L I T Y C H E C K I N G U S I N G P H P 7 C C ( A N D P H P C O M PAT I B I L I T Y )
- 8. A U T O M AT I C P H P 7 C O M PAT I B I L I T Y C H E C K I N G U S I N G P H P 7 C C ( A N D P H P C O M PAT I B I L I T Y ) • Objectives - Understand why upgrading to PHP 7 is important - Know how to use automated tools to help
- 9. A U T O M AT I C P H P 7 C O M PAT I B I L I T Y C H E C K I N G U S I N G P H P 7 C C ( A N D P H P C O M PAT I B I L I T Y ) • https://joind.in/talk/6e322 • https://github.com/mbniebergall/php7-incompatible
- 10. A U T O M AT I C P H P 7 C O M PAT I B I L I T Y C H E C K I N G U S I N G P H P 7 C C ( A N D P H P C O M PAT I B I L I T Y ) • Big projects originating with PHP 4 • Hundreds of thousands of lines of code • Path to upgrading to PHP 7
- 11. A U T O M AT I C P H P 7 C O M PAT I B I L I T Y C H E C K I N G U S I N G P H P 7 C C • Overview - Why upgrade to PHP 7 - Introduction to php7cc - Using php7cc - Introduction to PHPCompatibility - Using PHPCompatibility - Common issues - Live examples - Analysis - Considerations
- 12. W H Y U P G R A D E T O P H P 7
- 13. W H Y U P G R A D E T O P H P 7 • Incompatibilities to watch for • Automated tools can help
- 14. W H Y U P G R A D E T O P H P 7 • Performance - 2-3x faster than PH P 5.6 - 30-50% better memory consumption than PHP 5.6 - More requests per second
- 15. W H Y U P G R A D E T O P H P 7 • Security - CSPRNG random_bytes and random_int - libsodium in PHP 7.2 - mcrypt deprecated in PHP 7.1 - password_hash salt option deprecated - password_hash Argon2 hash available in PHP 7.2
- 16. W H Y U P G R A D E T O P H P 7 • New features - Scalar type declarations - public function thing(int $int) - Return type declarations - public function thing(int $int) : Something
- 17. W H Y U P G R A D E T O P H P 7 • New features - Reserved class names for types - Int - String - Float - Bool - NULL - TRUE - FALSE
- 18. W H Y U P G R A D E T O P H P 7 • New features - Null coalescing operator - $thing = $widget ?? $other; - Spaceship operator - $this <=> $that
- 19. W H Y U P G R A D E T O P H P 7 • New features - Anonymous classes - Generator return expressions - Exceptions instead of failures - Many more great features
- 20. W H Y U P G R A D E T O P H P 7 • Deprecated features - #1 PHP 4 style constructors - class Thing { public function Thing() {} }
- 21. W H Y U P G R A D E T O P H P 7 • Removed - #2 $HTTP_RAW_POST_DATA - $GLOBALS[‘HTTP_RAW_POST_DATA']
- 22. W H Y U P G R A D E T O P H P 7 • Deprecated features - #3 Static calls to non-static methods - class Thing { public function doSomething() {…} public static function doOther() {…} } Thing::doSomething(); $thing = new Thing; $thing->doOther();
- 23. W H Y U P G R A D E T O P H P 7 • Removed - call_user_method and call_user_method_array - ereg* - mysql* - mssql* - set_magic_quotes_runtime - set_socket_blocking
- 24. W H Y U P G R A D E T O P H P 7 • Removed - <% %> - <%= %> - <script language=“php”> </script>
- 25. W H Y U P G R A D E T O P H P 7 • Tools - XDebug no longer supports PHP 5 - Most libraries focused on PHP 7.0+
- 26. I N T R O D U C T I O N T O P H P 7 C C
- 27. P H P 7 C C • PHP 7 Compatibility Checker - sstalle on GitHub - Stand-alone library - Available using composer
- 28. P H P 7 C C • PHP 7 Compatibility Checker - Static code analysis - Upgrading from PHP 5.3-5.6 to PHP 7.0 - Identifies issues - Does not automatically fix the issues - php.net has recommended fixes
- 29. P H P 7 C C • PHP 7 Compatibility Checker - composer require sstalle/php7cc --dev - ./vendor/bin/php7cc src/ - composer global require sstalle/php7cc - export PATH="$PATH:$HOME/.config/composer/ vendor/bin" - php7cc src/
- 30. P H P 7 C C • PHP 7 Compatibility Checker - php7cc /project/path/ - php7cc /project/path/File.php
- 31. U S I N G P H P 7 C C
- 32. P H P 7 C C • PHP 7 Compatibility Checker - Option: -h --help - Help information - php7cc -h - php7cc --help
- 33. P H P 7 C C
- 34. P H P 7 C C • PHP 7 Compatibility Checker - Option: -e --extensions - File extension - Defaults to php - php7cc -e phps src/ - php7cc --extensions “phps,php” src/
- 35. P H P 7 C C • PHP 7 Compatibility Checker - Option: -x --except - Exclude files or directories - php7cc -x src/Deprecated.php src/ - php7cc --except=vendor/ src/
- 36. P H P 7 C C • PHP 7 Compatibility Checker - Option: -l --level - Level and higher to display - Defaults to info - info, message, warning, or error - php7cc -l warning src/ - php7cc --level=error src/
- 37. P H P 7 C C • PHP 7 Compatibility Checker - Option: -r --relative-paths - php7cc -r src/ - php7cc --relative-paths src/
- 38. P H P 7 C C • PHP 7 Compatibility Checker - Option: --integer-size - Used for bitwise shift check - Defaults to 32 - php7cc --integer-size=8 src/
- 39. P H P 7 C C • PHP 7 Compatibility Checker - Option: -o --output-format - Output format - Defaults to plain - plain or json - php7cc -o json src/ - php7cc --output-format=json src/
- 40. P H P 7 C C • PHP 7 Compatibility Checker - Option: -q --quiet - Run without output - php7cc -q src/ - php7cc --quiet src/
- 41. P H P 7 C C • PHP 7 Compatibility Checker - Option: -V --version - Version of php7cc - php7cc -V - php7cc --version - PHP 7 Compatibility Checker 1.2.1
- 42. P H P 7 C C • PHP 7 Compatibility Checker - Option: --ansi - Force ANSI output on - Pretty terminal colors - php7cc --no-ansi src/
- 43. P H P 7 C C • PHP 7 Compatibility Checker - Option: --no-ansi - Turn off ANSI output - No colors - php7cc --no-ansi src/
- 44. P H P 7 C C • PHP 7 Compatibility Checker - Option: -v -vv -vvv --verbose - Verbose level - Defaults to 1 - php7cc -vvv phps src/ - php7cc --verbose=2 src/
- 45. I N T R O D U C T I O N T O P H P C O M PAT I B I L I T Y
- 46. P H P C O M PAT I B I L I T Y • PHPCompatibility - Wim Godden, Juliette, and others - Sniff for PHP Code Sniffer (phpcs) - Static code analysis - Upgrading from PHP 5.1-5.6 to PHP 7.2
- 47. P H P C O M PAT I B I L I T Y • PHPCompatibility - composer require --dev wimg/php-compatibility - composer require --dev squizlabs/php_codesniffer - composer require --dev dealerdirect/ phpcodesniffer-composer-installer
- 48. P H P C O M PAT I B I L I T Y • PHPCompatibility - If only 1 sniff - phpcs --config-set installed_paths vendor/wimg/ php-compatibility/PHPCompatibility - Check with - phpcs --config-show
- 49. P H P C O M PAT I B I L I T Y • PHPCompatibility - ./vendor/bin/phpcs --standard=PHPCompatibility src/ - If bin is not in PATH - phpcs --standard=PHPCompatibility src/ - Run just PHP 7 compatibility sniff - phpcs src/ - Run all sniffs
- 50. U S I N G P H P C O M PAT I B I L I T Y
- 51. P H P C O M PAT I B I L I T Y • phpcs --help
- 52. P H P C O M PAT I B I L I T Y • PHPCompatibility - Option: -n --warning-severity=0 - Turn off warnings, just see errors - phpcs --standard=PHPCompatibility -n src/
- 53. P H P C O M PAT I B I L I T Y • PHPCompatibility - Option: -w - Show errors and warnings - This is the default - phpcs --standard=PHPCompatibility -w src/
- 54. P H P C O M PAT I B I L I T Y • PHPCompatibility - Option: -l - Local directory only - Do not go recursively through subdirectories - phpcs --standard=PHPCompatibility -l src/
- 55. P H P C O M PAT I B I L I T Y • PHPCompatibility - Option: -s - Show sniff codes - phpcs --standard=PHPCompatibility -s src/ - (PHPCompatibility.PHP.ForbiddenNamesAsDecl ared.intFound)
- 56. P H P C O M PAT I B I L I T Y • PHPCompatibility - Option: -a - Interactive mode - phpcs --standard=PHPCompatibility -a src/ SwitchMultiDefault - <ENTER> to recheck, [s] to skip or [q] to quit :
- 57. P H P C O M PAT I B I L I T Y • PHPCompatibility - Option: -e - Explain a coding standard - phpcs --standard=PHPCompatibility -e src/
- 58. P H P C O M PAT I B I L I T Y • PHPCompatibility - Option: -p - Show scan progress - phpcs --standard=PHPCompatibility -p src/
- 59. P H P C O M PAT I B I L I T Y • PHPCompatibility - Option: -q - Quiet mode - Disables progress and verbose output - phpcs --standard=PHPCompatibility -q src/
- 60. P H P C O M PAT I B I L I T Y • PHPCompatibility - Option: -m - Stop error messages from being recorded - (saves a lot of memory, but stops many reports from being used) - Can be useful for very large projects - phpcs --standard=PHPCompatibility -m src/
- 61. P H P C O M PAT I B I L I T Y • PHPCompatibility - Option: -v - List files processed - phpcs --standard=PHPCompatibility -v src/
- 62. P H P C O M PAT I B I L I T Y • PHPCompatibility - Option: -vv - Print rulesets from tokens recorded - Debugging mode - phpcs --standard=PHPCompatibility -vv src/
- 63. P H P C O M PAT I B I L I T Y • PHPCompatibility - Option: -vvv - Print rulesets from tokens recorded with processing information - Debugging mode with timing - phpcs --standard=PHPCompatibility -vvv src/
- 64. P H P C O M PAT I B I L I T Y • PHPCompatibility - Option: -i - Installed sniffs - phpcs --standard=PHPCompatibility -i
- 65. P H P C O M PAT I B I L I T Y • PHPCompatibility - Option: -d - php.ini directives - phpcs --standard=PHPCompatibility src/ -d memory_limt=1024M
- 66. P H P C O M PAT I B I L I T Y • PHPCompatibility - Other options available - Not going to cover them all
- 67. C O M M O N I S S U E S
- 68. C O M M O N I S S U E S • error_reporting level - E_ALL
- 69. C O M M O N I S S U E S • Static code analysis does not cover everything
- 70. C O M M O N I S S U E S • Unit and functional tests - Lack of tests with legacy applications
- 71. C O M M O N I S S U E S • Ignore directories or files - vendor - php7cc infinite loop error - Backwards compatible code
- 72. A N A LY S I S
- 73. A N A LY S I S • https://github.com/mbniebergall/php7-incompatible • PHP 5.6 to PHP 7.2 • 49 PHP files
- 74. A N A LY S I S • Incompatibilities - http://php.net/manual/en/ migration70.incompatible.php • Deprecated - http://php.net/manual/en/ migration70.deprecated.php
- 75. A N A LY S I S P H P C S E R R O R S P H P C S WA R N I N G S P H P 7 C C E R R O R S P H P 7 C C WA R N I N G S T O TA L 3 3 4 3 0 6 C O U N T 2 3 3 2 7 5 U N I Q U E 4 2 2 4
- 76. A N A LY S I S Totals php7cc-warning 9% php7cc-error 47% phpcs-warning 5% phpcs-error 40%
- 77. A N A LY S I S Table 1 File phpcs-error phpcs-warning php7cc-error php7cc-warning ArrayOrder.php 0 0 0 1 BitwiseShift.php 1 0 1 0 CallUserMethod.php 2 0 2 0 Constructor.php 0 1 1 0 DateFormatting.php 1 0 1 0 DivideByZero.php 0 0 2 0 DuplicateParameter.php 1 0 1 0 EregRemoved.php 4 0 2 0 EvalIsEvil.php 0 0 0 0 ExceptionHandler.php 0 0 0 0 ExtraParens.php 0 0 0 0 ForeachPointer.php 0 0 0 0 FuncGetArg.php 0 0 0 2 Globals.php 1 0 1 0 HexadecimalStrings.php 1 0 0 1
- 78. A N A LY S I S Table 1 File phpcs-error phpcs-warning php7cc-error php7cc-warning HttpRawPostData.php 1 0 2 0 ImagePostScript.php 1 0 1 0 Int.php 1 0 1 0 InvalidOctal.php 1 0 1 0 JsonToJsonD.php 0 0 0 0 LdapDeprecated.php 0 1 0 0 McryptDecprecated.php 1 0 0 0 Mssql.php 3 0 3 0 Mysql.php 3 0 3 0 ObjectByReference.php 1 0 1 0 PasswordHashSalt.php 0 0 1 0 SetMagicQuotes.php 1 0 1 0 SetStreamBlocking.php 1 0 1 0 ShortTags.php 0 2 0 0 Split.php 1 0 1 0
- 79. A N A LY S I S Table 1 File phpcs-error phpcs-warning php7cc-error php7cc-warning StaticCalls.php 0 0 0 0 SwitchMultiDefault.php 1 0 1 0 YieldParenthesis.php 0 0 0 1 php7-1/ArrayOrdering.php 0 0 0 1 php7-1/ClosureBoundVariable.php 3 0 0 0 php7-1/DynamicCalls.php 0 0 1 0 php7-1/Iterable.php 1 0 0 0 php7-1/JsonDecodeEmpty.php 0 0 0 0 php7-1/LongToIp.php 0 0 0 0 php7-1/RandAliasMtRand.php 0 0 0 0 php7-1/StringArray.php 0 0 0 0 php7-1/TooFewArguments.php 0 0 0 0 php7-1/Void.php 1 0 0 0 php7-2/CountNonCountables.php 0 0 0 0 php7-2/GetClassNull.php 0 0 0 0
- 80. A N A LY S I S Table 1 File phpcs-error phpcs-warning php7cc-error php7cc-warning php7-2/HashInitNotResource.php 0 0 0 0 php7-2/NumberFormatNegativeZero.php 0 0 0 0 php7-2/Object.php 1 0 1 0 php7-2/UndefinedConstants.php 0 0 0 0 TOTAL 33 4 30 6 COUNT 23 3 27 5
- 81. A N A LY S I S • Timing on 2364 files - php7cc - 276.595 seconds - PHPCompatibility - 271.26 seconds
- 82. A N A LY S I S • Frameworks Table 1 phpcs time phpcs issues php7cc time php7cc issues File Count Zend 35.27 330 ERROR ERROR 2364 Symfony 171.41 34 144.611 133 3740 Slim 1.93 0 1.642 1 46 Wordpress 188.65 302 123.979 177 1280 Laravel 31.13 36 22.478 83 878
- 83. L I V E E X A M P L E S
- 84. Q U E S T I O N S ? https://joind.in/talk/6e322
- 85. R E S O U R C E S • http://www.zend.com/en/resources/php7_infographic • https://github.com/sstalle/php7cc • https://github.com/wimg/PHPCompatibility