how to capitalize first character of sub array keys
<pre><code>Array
(
[Carriers] =&gt; Array
    (
        [Carrier] =&gt; Array
            (
                [0] =&gt; Array
                    (
                        [carriersid] =&gt; a2e01423-2e8f-4458-8c13-2bfd08591d75
                        [phonenumber] =&gt; 1234567890
                        [network] =&gt; CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA
                        [wireless] =&gt; True
                        [zipcode] =&gt; 92675
                        [city] =&gt; Capistrano Valley
                        [price] =&gt; 3.0000
                        [createddate] =&gt; 2016-02-19 06:18:56
                    )
</code></pre>

<p>I want to capitalize [carriersid] to Carriersid.
I know array_change_key_case function is there but it only make keys either UPPERCASE or LOWERCASE.
Anyhelp is much appreciated. :)</p>