PHP Manual: array_change_key_case


Enter the keyword for better results
PHP Manual
PrevNext

array_change_key_case

(PHP 4 >= 4.2.0, PHP 5)

array_change_key_case -- Changes all keys in an array

Description

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 1. array_change_key_case() example

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

The above example will output:

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.

PrevHomeNext
Array FunctionsUparray_chunk