#arraykeyexists

Turbo Learn PHPTurboLearnPHP
2026-01-22

How to Fix isset Hiding Null Config Values

isset returns false for null and masks real keys.

youtube.com/watch?v=K3RX_BEvc30

2016-11-25
I have replaced #array_key_exists() with #isset() in #PHPExcel (I know it is no longer maintained) which gaves a speed-boot from ~147 rows/s to ~214 rows/s. https://github.com/PHPOffice/PHPExcel/pull/1069

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