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IntlDateFormatter::parse(), localtime() and parseToCalendar() passed the PHP byte offset to ICU, which expects a UTF-16 code-unit position, and returned ICU's position unchanged. With multibyte text before the date, parsing started at the wrong place and the returned offset was too small. Convert the offset in both directions as phpGH-23094 did for NumberFormatter, and reject an offset that splits a UTF-8 sequence. A returned position inside a surrogate pair, which a partially matched literal can produce, maps to the start of that character.
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Submitted upstream as php#24126. |
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Translate PHP byte offsets to ICU UTF-16 positions and back for IntlDateFormatter parsing APIs, including calendar errors.