Xlsx Reader Formula with quotePrefix #3497
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Fix PHPOffice#3495. This seems to be a bug in Excel, one which it manages to cover up but PhpSpreadsheet is affected. User enters a formula preceded by an apostrophe into a cell. Excel turns on `quotePrefix` style and stores the data as a string rather than a formula. User now enters a formula not preceded by an apostrophe into the same cell. Excel stores it is a formula but does not turn `quotePrefix` off. When the spreadsheet is saved, the cell's style specifies `quotePrefix`, but the cell's content indicates it's a formula. Till now, PhpSpreadsheet sees that quotePrefix is set, and therefore treats the cell's contents as a string rather than a formula. This PR will change that behavior so that quotePrefix is automatically turned off when Xlsx Reader sees that the cell indicates that it is a formula.
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Fix PHPOffice#3683. PR PHPOffice#3497 fixed a problem involving formulas and the quotePrefix style attribute. It did so by automatically turning off quotePrefix for any formulas encountered by Xlsx Reader. Under the right circumstances, it turns out that that change can cause a file read to take noticeably more time than previously. This change will turn off quotePrefix only if it is already on, and that appears to eliminate the performance problem while continuing to solve the original problem.
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oleibman
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Dec 6, 2023
* Performance Improvement for Xlsx Reader Fix #3683. PR #3497 fixed a problem involving formulas and the quotePrefix style attribute. It did so by automatically turning off quotePrefix for any formulas encountered by Xlsx Reader. Under the right circumstances, it turns out that that change can cause a file read to take noticeably more time than previously. This change will turn off quotePrefix only if it is already on, and that appears to eliminate the performance problem while continuing to solve the original problem. * Very Minor Improvement * Update CHANGELOG.md
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Fix #3495. This seems to be a bug in Excel, one which it manages to cover up but PhpSpreadsheet is affected. User enters a formula preceded by an apostrophe into a cell. Excel turns on
quotePrefixstyle and stores the data as a string rather than a formula. User now enters a formula not preceded by an apostrophe into the same cell. Excel stores it is a formula but does not turnquotePrefixoff. When the spreadsheet is saved, the cell's style specifiesquotePrefix, but the cell's content indicates it's a formula. Till now, PhpSpreadsheet sees that quotePrefix is set, and therefore treats the cell's contents as a string rather than a formula. This PR will change that behavior so that quotePrefix is automatically turned off when Xlsx Reader sees that the cell indicates that it is a formula.This is:
Checklist:
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