PHP: camel Case Get Parts

gistfile1.txt

<?php
function up($str){
 return strtoupper($str);
} 
function camelCaseGetParts($str, $count=0) 
{ 
    $parts            = array()        ; 
    $partIndex    =    1                    ; 
    $len                =    strlen($str)    ; 
     
    for($i=0;$i<$len;$i++) 
    { 
        $char    = $str[$i]; 
        if ($char===up($char))$partIndex++; 
        if($partIndex-1 == $count-1 && $count != 0) 
        { 
            $parts[$partIndex-1] = substr($str,$i,len($str)); 
            return $parts; 
        } 
        $parts[$partIndex-1] .= $char; 
    } 
    return $parts; 
     
}
print_r(camelCaseGetParts("camelCaseGetParts"));
?>