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Online Sandbox for SQL and PHP: Write, Run, Test, and Share SQL Queries and PHP Code

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<?php $collection1 = collect([1,2,2,4]); $collection2 = collect([1,5,6,4]); $duplicates = $collection1 ->merge($collection2) ->duplicates() ->unique() // use this if you need the duplicates as unique ->values(); var_export($duplicates);
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