  ?

array -  , 
 php      . 
Array       () . 
   :

<?php
$q[]="Hello";
$q[]=" world!";
print "$q[0]$q[1]";
exit;
?>

     $q    "[]"  ( ,   ). 
     :

<?php
$q[0]="Hello";
$q[1]=" world!";
print "$q[0]$q[1]";
exit;
?>

        " $q   , 
      hello,     , 
      world,      $q       
 hello world!    ".    $q[0]  . .  , 
    ,    ,   .

       , 
    -  ,  (),    :

<?php
$q[""] = array("name"=>"","messag"=>"hello world!");
print $q[""]["messag"];
exit;
?>

      name  , 
  messag  hello world.

         , 
                 , 
    :

<?php
$q=array("hello","world","!");
print $q[0];
?>

,     $q[0]   hello,   $q[1]   world. 
   ,      . 
      .