$somearray = array(
  array('a' => 'Hello'),
  array('b' => 'World')
);
 
echo $somearray[0]['a'] . ' ' . $somearray[1]['b'];
// Hello World

<?php
  // Set array parts
  $a = array("1" => "one", "2" => "two");
  $b = array("a" => "aye", "b" => "bee");
  $c = array("a scalar", $a, $b);
 
  // Extract a sub-element from an array in the array
  $d = $c[1][2];
 
  // Extract a sub-array from the array
  $e = $c[2];
 
  // Display the various demonstration bits
  print "<pre>\n\$c[2] = ";
  print_r ($c[2]);
  print "</pre>\n\n";
  print "\$c[2]['b'] = {$c[2]['b']}<br>\n\n";
  print "<pre>\n\$c[1] = ";
  print_r ($c[1]);
  print "</pre>\n\n";
  print "\$d = $d<br>\n\n";
  print "<pre>\n\$e = ";
  print_r ($e);
  print "</pre>\n\n";
  print "\$c[0] = $c[0]<br>\n";
?>

$avar = $somearray[0]['a'];
$bvar = $somearray[1]['b'];
 
echo $avar;
echo $bvar;
 
// Hello
// World