<?php
/**
* PHPCompatibility, an external standard for PHP_CodeSniffer.
*
* @package PHPCompatibility
* @copyright 2012-2019 PHPCompatibility Contributors
* @license https://opensource.org/licenses/LGPL-3.0 LGPL3
* @link https://github.com/PHPCompatibility/PHPCompatibility
*/
namespace PHPCompatibility\Sniffs\Syntax;
use PHPCompatibility\Sniff;
use PHP_CodeSniffer_File as File;
use PHP_CodeSniffer_Tokens as Tokens;
/**
* Detect dynamic access to static methods and properties, as well as class constants.
*
* As of PHP 5.3, static properties and methods as well as class constants
* can be accessed using a dynamic (variable) class name.
*
* PHP version 5.3
*
* @link https://www.php.net/manual/en/migration53.new-features.php
*
* @since 8.1.0
* @since 9.0.0 Renamed from `DynamicAccessToStaticSniff` to `NewDynamicAccessToStaticSniff`.
*/
class NewDynamicAccessToStaticSniff extends Sniff
{
/**
* Returns an array of tokens this test wants to listen for.
*
* @since 8.1.0
*
* @return array
*/
public function register()
{
return array(
\T_DOUBLE_COLON,
);
}
/**
* Processes this test, when one of its tokens is encountered.
*
* @since 8.1.0
*
* @param \PHP_CodeSniffer_File $phpcsFile The file being scanned.
* @param int $stackPtr The position of the current token in the
* stack passed in $tokens.
*
* @return void
*/
public function process(File $phpcsFile, $stackPtr)
{
if ($this->supportsBelow('5.2') === false) {
return;
}
$tokens = $phpcsFile->getTokens();
$prevNonEmpty = $phpcsFile->findPrevious(Tokens::$emptyTokens, ($stackPtr - 1), null, true);
// Disregard `static::` as well. Late static binding is reported by another sniff.
if ($tokens[$prevNonEmpty]['code'] === \T_SELF
|| $tokens[$prevNonEmpty]['code'] === \T_PARENT
|| $tokens[$prevNonEmpty]['code'] === \T_STATIC
) {
return;
}
if ($tokens[$prevNonEmpty]['code'] === \T_STRING) {
$prevPrevNonEmpty = $phpcsFile->findPrevious(Tokens::$emptyTokens, ($prevNonEmpty - 1), null, true);
if ($tokens[$prevPrevNonEmpty]['code'] !== \T_OBJECT_OPERATOR) {
return;
}
}
$phpcsFile->addError(
'Static class properties and methods, as well as class constants, could not be accessed using a dynamic (variable) classname in PHP 5.2 or earlier.',
$stackPtr,
'Found'
);
}
}