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array_change_key_case

Changes all keys in an array (PHP 4 >= 4.2.0, PHP 5)
array array_change_key_case ( array input [, int case] )

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

Parameters

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.

Errors/Exceptions

Throws E_WARNING if input is not an array.

Examples

Example 233. array_change_key_case() example

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

The above example will output:

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


Notes

Note:

If an array has indices that will be the same once run through this function (e.g. "keY" and "kEY"), the value that is later in the array will override other indices.


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