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php 7.4 and php 8 have removed the ability to use curly braces to select a single character from a string.
Error is: Array and string offset access syntax with curly braces is deprecated at ....
The fix is to use square brackets. https://www.php.net/manual/en/migration74.deprecated.php#migration74.deprecated.core.array-string-access-curly-brace
Searched for \w{ with regex and replaced all instances manually, there's two instances that aren't applicable.
My commit includes a lot of whitespace changes due to my IDE settings so easier to review by adding ?w=1 to the URL to hide the whitespace changes.