LowExpiryCacheTime: improve handling of potential parse errors in eval-ed code #654
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…led code Issue reported by GaryJones in Automattic/VIP-Coding-Standards 628#issuecomment-790653774 In rare cases, it is possible that the call to `eval()` with "safe" tokens only, would still result in a parse error. An example of such a case is when the PHP 5.6 `**` (`T_POW`) operator is used. PHPCS backfills the tokenization, which means that the operator is correctly recognized by the sniff as a "safe" token to use in the `eval()` statement. However, when the sniff is being run on PHP 5.4/5.5, the `eval()` will also be run on PHP 5.4/5.5 and while PHPCS backfills the token, PHP does not, resulting in a parse error in the `eval`-ed code, upon which the `eval()` will return `false`. This commit: * Silences the parse error notice. * Checks the output of the `eval()` for it being boolean `false` and if so, flags the statement for manual inspection, same as when any "non-safe" token is encountered.
GaryJones
approved these changes
Apr 15, 2021
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Issue reported by @GaryJones in #628 (comment)
In rare cases, it is possible that the call to
eval()with "safe" tokens only, would still result in a parse error.An example of such a case is when the PHP 5.6
**(T_POW) operator is used. PHPCS backfills the tokenization, which means that the operator is correctly recognized by the sniff as a "safe" token to use in theeval()statement.However, when the sniff is being run on PHP 5.4/5.5, the
eval()will also be run on PHP 5.4/5.5 and while PHPCS backfills the token, PHP does not, resulting in a parse error in theeval-ed code, upon which theeval()will returnfalse.This commit:
eval()for it being booleanfalseand if so, flags the statement for manual inspection, same as when any "non-safe" token is encountered.