php - Parse error: syntax error, unexpected ']'

I'm getting this error:

Parse error: syntax error, unexpected ']', expecting identifier (T_STRING) or variable (T_VARIABLE) or number (T_NUM_STRING) in your code on line 70

Line 70 is $message.

$random_keys=array_rand($lel,1);
$message[] = $lel[$random_keys[0]];

The whole code is here:

$message = array(); 
$lel = array(
    'Are you sure its the new year?', 
    'And i thought i was dumb', 'its not new year yet', 
    'LOL its ${date}', '...', '.....', '...', 'WUT', '.......', 
    'Ya drunk bruh ?', 'You sure you are not drunk ? what is 1+1 then ?'

);
$random_keys=array_rand($lel,1);
$message[] = $lel[$random_keys[0]];

Can we do it like this?

$message[] = $lel[rand(1,11)];

It still gives:

Parse error: syntax error, unexpected ']', expecting identifier (T_STRING) or variable (T_VARIABLE) or number (T_NUM_STRING)