$string = "Ajay Devgn Vijay Salgaonkar Shriya Saran Nandini Salgaonkar Tabu Meera Deshmukh Rajat Kapoor Mahesh Deshmukh Ishita Dutta Anju Salgaonkar Prasanna Ketkar Sr. PI Shrikant Prabhu Prathamesh Parab";
$i = 0;
$spacecounter = 0;
$sonuc = "";
$cikti = Array();
$arrlength = 0;

while($i <= strlen($string)){
	
	if($string{$i} === " "){
		$spacecounter++;
		if($spacecounter%2 == 0){	
			$sonuc .= ",";
			$cikti[$arrlength] = $sonuc;
			$sonuc ="";
			$arrlength++;
		}
	}
	if($string{$i} === ""){
		$cikti[$arrlength] = $sonuc.",";
	}
	$sonuc .= $string{$i};
	$i++;
}

shuffle($cikti);

for($i = 0;$i<count($cikti);$i++){
	
	echo $cikti[$i];
}