Tokenizer not applying tab replacement to heredoc/nowdoc closers #3639
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Since PHP 7.3, heredoc/nowdoc closers may be indented. This indent can use either tabs or spaces and the indent is included in the `T_END_HEREDOC`/`T_END_NOWDOC` token contents as received from the PHP native tokenizer. However, the PHPCS `Tokenizer` did no execute tab replacement on these token leading to unexpected `'content'` and incorrect `'length'` values in the `File::$tokens` array, which in turn could lead to incorrect sniff results and incorrect fixes. This commit adds the `T_END_HEREDOC`/`T_END_NOWDOC` tokens to the array of tokens for which to do tab replacement to make them more consistent with the rest of PHPCS. I also considered splitting the token into a `T_WHITESPACE` token and the `T_END_HEREDOC`/`T_END_NOWDOC` token, but that could potentially break sniffs which expect the `T_END_HEREDOC`/`T_END_NOWDOC` token directly after the last `T_HEREDOC`/`T_NOWDOC` token. The current fix does not contain that risk. Includes unit tests safeguarding this change. The tests will only run on PHP 7.3+ as flexible heredoc/nowdocs don't tokenize correctly in PHP < 7.3.
jrfnl force-pushed the feature/tokenizer-improve-handling-php73-flexible-heredoc-nowdoc branch from e921934 to bdf5c49 Compare 
gsherwood changed the title 
| Thank you for fixing this |
jrfnl deleted the feature/tokenizer-improve-handling-php73-flexible-heredoc-nowdoc branch 1 task
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Since PHP 7.3, heredoc/nowdoc closers may be indented.
This indent can use either tabs or spaces and the indent is included in the
T_END_HEREDOC/T_END_NOWDOCtoken contents as received from the PHP native tokenizer.However, the PHPCS
Tokenizerdid not execute tab replacement on these token leading to unexpected'content'and incorrect'length'values in theFile::$tokensarray, which in turn could lead to incorrect sniff results and incorrect fixes.This commit adds the
T_END_HEREDOC/T_END_NOWDOCtokens to the array of tokens for which to do tab replacement to make them more consistent with the rest of PHPCS.I also considered splitting the token into a
T_WHITESPACEtoken and theT_END_HEREDOC/T_END_NOWDOCtoken, but that could potentially break sniffs which expect theT_END_HEREDOC/T_END_NOWDOCtoken directly after the lastT_HEREDOC/T_NOWDOCtoken. The current fix does not contain that risk.Includes unit tests safeguarding this change.
The tests will only run on PHP 7.3+ as flexible heredoc/nowdocs don't tokenize correctly in PHP < 7.3.