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<?php $anna_array = array('Soccer' => "10", 'Basketball' => "20", 'Tennis' => "30", 'Atletics' => "40", 'Volleyball' => "50"); $john_array = array('Soccer' => "15", 'Basketball' => "15", 'Atletics' => "45"); $anna_activities = array_intersect_key($anna_array, $john_array); $john_activities = array_intersect_key($john_array, $anna_array); var_dump($anna_activities, $john_activities);
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.15, 8.5.0 - 8.5.1
array(3) { ["Soccer"]=> string(2) "10" ["Basketball"]=> string(2) "20" ["Atletics"]=> string(2) "40" } array(3) { ["Soccer"]=> string(2) "15" ["Basketball"]=> string(2) "15" ["Atletics"]=> string(2) "45" }

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134.24 ms | 409 KiB | 5 Q