<?php $array = [ ["firstname" => "John", "lastname" => "", "email" => "", "uri" => ""], ["firstname" => "", "lastname" => "Smith", "email" => "", "uri" => ""], ["firstname" => "", "lastname" => "", "email" => "john@example.org", "uri" => ""] ]; var_export( array_map('max', array_merge_recursive(...$array)) );
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