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Expand character ranges when trimming a numeric-string - #7013
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Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
staabm
reviewed
Nov 9, 2026
| * Reads the character list like PHP's php_charmask(): "a..z" stands for | ||
| * every byte from "a" to "z", so "/..:" contains the digits. | ||
| */ | ||
| public function containsDigit(string $characters): bool |
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this new method should have some unit tests
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For a
numeric-string, the trim extensions keepnumeric-stringwhen the character list cannot remove a digit. The old check only looked for a literal digit, so it missed..ranges:'/..:'covers0to9, andtrim('12', '/..:')returns''.TrimCharactersHelper::containsDigit()reads the character list the same way as PHP'sphp_charmask(). A valid range adds every byte between its ends. An invalid range, such as'..:'or':../', adds no range, so those lists still keepnumeric-string.I compared the helper with PHP's own
trim()on 300,000 random character lists. The lists had dots, digits,/,:and random bytes. The helper gave the same answer for every list. The old regex gave a different answer for 2,781 of them.Closes phpstan/phpstan#15683
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