Allow configuring escape for CsvWriter#10
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PHP 8.4 deprecates calls to `fputcsv` that don't pass `''` as the `$escape` argument. Without this change, it's impossible to avoid a deprecation warning when using `CsvWriter`. If a new major version of this library is released, it should change the default to empty string to avoid the warning by default.
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Jul 23, 2026
PHP 8.4 deprecates fputcsv() calls that omit the $escape argument. Add an optional constructor parameter (default '\\' for BC) and pass it through to fputcsv so callers can silence the deprecation and control escape behavior (including empty string for modern "no escape" CSV). Adds PHPUnit coverage that proves escape is applied and that writing works without deprecation exceptions under convertDeprecationsToExceptions. Supersedes #10.
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PHP 8.4 deprecates calls to
fputcsvthat don't pass''as the$escapeargument. Without this change, it's impossible to avoid a deprecation warning when usingCsvWriter.If a new major version of this library is released, it should change the default to empty string to avoid the warning by default.