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Summary of Changes
replace substr with array access
no need to check if there is a closing curly brace. json_decode will later cause an exception if there is a problem with JSON. Also ini files (strings) do not have curly braces at start/end
extracted an array accessed variable that was looped unnecessarily in a loop
type safe comparisons
removal of unnecessary parentheses
double quotes to single quotes
replace is_null()
flip conditions where the latter was cheaper
formatting
[tests]
Testing Instructions
Code review?