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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 $collection = collect([ collect(['a','b','c','d']), collect(['b','c','d','e']), collect(['c','d','e','f']) ]); var_export( $collection->reduce(fn($result, $row) => $result->intersect($row), $collection->first()) );
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