array_change_key_case(): Breaking array into chunks

array_change_key_case ($input_array , int $size [, bool $preserve_keys = FALSE ] )
ParameterDESCRIPTION
$input_arrayRequired : Input array to change key cases
$caseOptional : CASE_LOWER ( default ) , keys will be changed to lower case
CASE_UPPER , keys will be changed to upper case
Return value is an array with keys cahnges to Upper case or Lower case.

Example 1

$input=array('One'=>1,'Two'=>2,'Three'=>3,'Four'=>4,'Five'=>5);
$output=array_change_key_case($input);
echo print_r($output);
Output is here
Array ( [one] => 1 [two] => 2 [three] => 3 [four] => 4 [five] => 5 ) 1

Example 2 with CASE_UPPER

$input=array('One'=>1,'Two'=>2,'Three'=>3,'Four'=>4,'Five'=>5);
$output=array_change_key_case($input,CASE_UPPER);
echo print_r($output);
Output is here
Array ( [ONE] => 1 [TWO] => 2 [THREE] => 3 [FOUR] => 4 [FIVE] => 5 ) 1

Example 3 with CASE_LOWER ( default )

$input=array('One'=>1,'Two'=>2,'Three'=>3,'Four'=>4,'Five'=>5);
$output=array_change_key_case($input,CASE_LOWER);
echo print_r($output);
Output is here
Array ( [one] => 1 [two] => 2 [three] => 3 [four] => 4 [five] => 5 ) 1


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