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

for($i=0;$i<$arrlength;$i++){
	
	echo $cikti[rand(0,count($cikti)-1)];
}