PHP Code simplest example 


    function SplitOnFirstUnique($s){
    	$len = strlen($s); 
    	$output = [];
    	$newstring = '';
    	for ($i=0; $i < $len ; $i++) { 
    		$newstring = $newstring.$s[$i];
    		if(!in_array($s[$i] , $output  )){
    			$output[] = $newstring;
    			$newstring = '';
    		}
    	}
    	return $output;
    }