PHP - Function array_change_key_case()


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Syntax

array array_change_key_case ( array $input [, int $case] )

Definition and Usage

Returns an array with all keys from input lowercased or uppercased. Numbered indices are left as is.

Parameters

Parameter Description
input The array to work on
case Either CASE_UPPER or CASE_LOWER (default)

Return Values

Returns an array with its keys lower or uppercased, or false if input is not an array.

Example

Try out following example −

<?php
   $input_array = array("FirSt" => 1, "SecOnd" => 4);
   print_r(array_change_key_case($input_array, CASE_UPPER));
?> 

This will produce following result −

Array ( [FIRST] => 1 [SECOND] => 4 )

php_function_reference.htm

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