115 lines
4.2 KiB
PHP
115 lines
4.2 KiB
PHP
<?php
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/**
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* PHPCompatibility, an external standard for PHP_CodeSniffer.
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*
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* @package PHPCompatibility
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* @copyright 2012-2019 PHPCompatibility Contributors
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* @license https://opensource.org/licenses/LGPL-3.0 LGPL3
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* @link https://github.com/PHPCompatibility/PHPCompatibility
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*/
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namespace PHPCompatibility\Sniffs\Variables;
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use PHPCompatibility\Sniff;
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use PHP_CodeSniffer_File as File;
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use PHP_CodeSniffer_Tokens as Tokens;
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/**
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* The interpretation of variable variables has changed in PHP 7.0.
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*
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* PHP version 7.0
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*
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* @link https://www.php.net/manual/en/migration70.incompatible.php#migration70.incompatible.variable-handling.indirect
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* @link https://wiki.php.net/rfc/uniform_variable_syntax
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*
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* @since 7.1.2
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* @since 9.0.0 Renamed from `VariableVariablesSniff` to `NewUniformVariableSyntaxSniff`.
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*/
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class NewUniformVariableSyntaxSniff extends Sniff
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{
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/**
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* Returns an array of tokens this test wants to listen for.
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*
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* @since 7.1.2
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*
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* @return array
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*/
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public function register()
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{
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return array(\T_VARIABLE);
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}
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/**
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* Processes this test, when one of its tokens is encountered.
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*
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* @since 7.1.2
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*
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* @param \PHP_CodeSniffer_File $phpcsFile The file being scanned.
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* @param int $stackPtr The position of the current token
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* in the stack passed in $tokens.
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*
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* @return void
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*/
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public function process(File $phpcsFile, $stackPtr)
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{
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if ($this->supportsAbove('7.0') === false) {
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return;
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}
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$tokens = $phpcsFile->getTokens();
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// Verify that the next token is a square open bracket. If not, bow out.
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$nextToken = $phpcsFile->findNext(Tokens::$emptyTokens, ($stackPtr + 1), null, true, null, true);
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if ($nextToken === false || $tokens[$nextToken]['code'] !== \T_OPEN_SQUARE_BRACKET || isset($tokens[$nextToken]['bracket_closer']) === false) {
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return;
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}
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// The previous non-empty token has to be a $, -> or ::.
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$prevToken = $phpcsFile->findPrevious(Tokens::$emptyTokens, ($stackPtr - 1), null, true, null, true);
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if ($prevToken === false || \in_array($tokens[$prevToken]['code'], array(\T_DOLLAR, \T_OBJECT_OPERATOR, \T_DOUBLE_COLON), true) === false) {
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return;
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}
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// For static object calls, it only applies when this is a function call.
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if ($tokens[$prevToken]['code'] === \T_DOUBLE_COLON) {
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$hasBrackets = $tokens[$nextToken]['bracket_closer'];
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while (($hasBrackets = $phpcsFile->findNext(Tokens::$emptyTokens, ($hasBrackets + 1), null, true, null, true)) !== false) {
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if ($tokens[$hasBrackets]['code'] === \T_OPEN_SQUARE_BRACKET) {
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if (isset($tokens[$hasBrackets]['bracket_closer'])) {
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$hasBrackets = $tokens[$hasBrackets]['bracket_closer'];
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continue;
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} else {
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// Live coding.
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return;
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}
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} elseif ($tokens[$hasBrackets]['code'] === \T_OPEN_PARENTHESIS) {
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// Caught!
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break;
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} else {
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// Not a function call, so bow out.
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return;
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}
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}
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// Now let's also prevent false positives when used with self and static which still work fine.
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$classToken = $phpcsFile->findPrevious(Tokens::$emptyTokens, ($prevToken - 1), null, true, null, true);
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if ($classToken !== false) {
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if ($tokens[$classToken]['code'] === \T_STATIC || $tokens[$classToken]['code'] === \T_SELF) {
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return;
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} elseif ($tokens[$classToken]['code'] === \T_STRING && $tokens[$classToken]['content'] === 'self') {
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return;
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}
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}
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}
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$phpcsFile->addError(
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'Indirect access to variables, properties and methods will be evaluated strictly in left-to-right order since PHP 7.0. Use curly braces to remove ambiguity.',
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$stackPtr,
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'Found'
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);
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}
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}
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