PHP Compatibility Coding Standard for PHP_CodeSniffer

This is a set of sniffs for PHP_CodeSniffer that checks for PHP version compatibility.

Installation

Install PHP_CodeSniffer with pear install PHP_CodeSniffer (PHP_CodeSniffer 1.5.1 or later is required for full support, notices may be thrown on older versions).
Checkout this repository as PHPCompatibility into the PHP/CodeSniffer/Standards directory.
Use the coding standard with phpcs --standard=PHPCompatibility
You can specify which PHP version you want to test against by specifying --runtime-set testVersion 5.5.

More information can be found on Wim Godden's blog.

All the sniffs are fully tested with PHPUnit tests. In order to run the tests on the sniffs, the following installation steps are required.

Install the master branch of PHP_CodeSniffer [https://github.com/squizlabs/PHP_CodeSniffer.git].

This can be done with composer by adding the following into ~/.composer/composer.json:
```
 {
     "require": {
         "phpunit/phpunit": "3.7.*",
         "squizlabs/php_codesniffer": "dev-master"
     }
 }
```
Run the following command to compose in the versions indicated in the above global composer.json file:
```
 $ composer.phar global install
```
Update your system $PATH to include the globally composed files:
```
 $ export PATH=~/.composer/vendor/bin:$PATH
```

Be sure that the PHPCompatibility directory is symlinked into PHP_Codesniffer's standards directory:

 $ ln -s /path/to/PHPCompatibility ~/.composer/vendor/squizlabs/php_codesniffer/CodeSniffer/Standards/PHPCompatibility

Verify standard is available with phpcs -i. The output should include PHPCompatibility
Run the tests by running phpunit in the root directory of PHPCompatibility. It will read the phpunit.xml file and execute the tests

This code is released under the GNU Lesser General Public License (LGPL). For more information, visit http://www.gnu.org/copyleft/lesser.html