PHP generate foreach and generate it as array

please help I need create some array random from this case:

foreach (range(1,3) as $number) { 
$lala1= "\"img$number\",";
$lala2 = array("$lala1");
echo $lala2[array_rand($lala2)];
}

Is give me this result:

"img1","img2","img3",

but I need the result to show random like this:

img1 (with random img1,img2, or img3)

Thank you