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PHP Undefined Array Key Access This repository demonstrates a common yet subtle bug in PHP: accessing undefined array keys. PHP's flexible nature can mask these issues, leading to unexpected behavior ...
finwe linked a pull request that will close this issue Fix "Undefined array key _ in Otl.php:1542" #1962 on Nov 30, 2023 ...
Is there a PHP function that can compare all 4 arrays, sum the values of duplicate keys and returns an array with all the sums?<BR><BR>Is that well enough explained?
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