5.12<br>Array
(
    [0] => Hola
    [1] => 3
    [2] => 5.12
    [3] => 1
)
<br>Array
(
    [0] => Hola
    [1] => 6
    [2] => 12.1
    [3] => 
)
<br>Array
(
    [0] => Hola
    [1] => 4
    [4] => 1
    [5] => 3
)
<br><pre>array(4) {
  [0]=>
  string(4) "Hola"
  [1]=>
  string(1) "4"
  [4]=>
  bool(true)
  [5]=>
  int(3)
}
Hola<br />4<br /><br />
<b>Warning</b>:  Undefined array key 2 in <b>/var/www/html/clases/Arrays.php</b> on line <b>23</b><br />
<br /><br />
<b>Warning</b>:  Undefined array key 3 in <b>/var/www/html/clases/Arrays.php</b> on line <b>23</b><br />
<br />Esto es un foreach <br>Hola<br />4<br />1<br />3<br /></pre><pre>array(7) {
  ["Antonio"]=>
  int(5)
  [0]=>
  int(4)
  [1]=>
  int(7)
  [5]=>
  int(6)
  ["Luis"]=>
  int(9)
  [6]=>
  int(2)
  ["Berta"]=>
  int(7)
}
</pre>5<br />4<br />7<br />6<br />9<br />2<br />7<br />Antonio=>5<br />0=>4<br />1=>7<br />5=>6<br />Luis=>9<br />6=>2<br />Berta=>7<br /><br><br>alemania=>Berlin<br />alemania=>Hannover<br />francia=>París<br />francia=>Lyon<br />espania=>Palencia<br />