Splitting a name based on Capital letters

[phpmel]

I have a username that is Joined together as follows
JohnSmith
The first letter in each of the first and last name is Capital
Can some one help me write a php function to split the name and get John Smith.
I am not sure what functions to use.

[chinmay4u]

here is the code [php]
<?php
function isuppercase($char)
{
if(ord($char)>64 && ord($char)<91)
{
return TRUE;
}
elseif(ord($char)>96 && ord($char)<123)
{
return FALSE;
}
else
{
return 'Non Alpha Character';
}
}

$string = 'JohsnSmithAndHisBrotherWentToLondon';
for($i=0; $i<strlen($string); $i++)
{

if( ($isupper = isuppercase($string{$i})) !== 'Non Alpha Character' )
{
if($isupper)
{
echo '<br>';
}
echo ' <strong>'.$string{$i}.'</strong> ';
}
else
{
echo 'Is not an alpha character';
}
}
?>[/php]

[subsquare]

I have a username that is Joined together as follows
JohnSmith
The first letter in each of the first and last name is Capital
Can some one help me write a php function to split the name and get John Smith.
I am not sure what functions to use.

Or in one line like this:
[php]preg_replace('/[A-Z]/', ' $0', $text_tp_use);[/php]

[satas]

Or in one line like this:
[php]preg_replace('/[A-Z]/', ' $0', $text_tp_use);[/php]

Wow, that is awesome!