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PHP array_change_key_case() Function

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By StackCodee

 <?php

$age=array("Kamran"=>"35","Ali"=>"37","Mehran"=>"39");
print_r(array_change_key_case($age,CASE_UPPER));

?>


Output:

Array ( [KAMRAN] => 35 [ALI] => 37 [MEHRAN] => 39 )
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