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What is the correct answer?

4

What will be the output of the following PHP code?
 <?php  $age = array(Peter=>35, Ben=>37, Joe=>43);
print_r(array_change_key_case($age, CASE_UPPER));
?>

A. 

Array ( [Peter] => 35 [Ben] => 37 [Joe] => 43 )

B. 

Array ( [peter] => 35 [ben] => 37 [joe] => 43 )

C. 

Array ( [PETER] => 35 [BEN] => 37 [JOE] => 43 )

D. 

Array ( [PeTeR] => 35 [BeN] => 37 [Joe] => 43 )

Correct Answer :

C. 

Array ( [PETER] => 35 [BEN] => 37 [JOE] => 43 )


The array_change_key_case() function changes all keys in an array to lowercase or uppercase.
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