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Clarify that PCRE delimiters must be ASCII characters (#4817)#5223

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lacatoire:fix/issue-4817-delimiter-multibyte-clarification
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Clarify that PCRE delimiters must be ASCII characters (#4817)#5223
lacatoire wants to merge 1 commit intophp:masterfrom
lacatoire:fix/issue-4817-delimiter-multibyte-clarification

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@lacatoire lacatoire commented Jan 30, 2026

Multi-byte UTF-8 characters cannot be used as delimiters since they are processed at the byte level.

Fixes #4817

Multi-byte UTF-8 characters cannot be used as delimiters since they are
processed at the byte level.
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regex delimeter may not be non-ASCII character when utf-8 is current character set

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