foreach($arr as $key=>$value);foreach($arr as $value);

<?php

$arr = array('one'=>'yi', 'two'=>'er', 'three'=>'san');

foreach($arr as $key=>$value)

{

echo $key;

echo '-';

echo $arr[$key];

echo '-';

echo $value;

echo '/';

}

echo '<br>';

foreach($arr as $a)

{

echo $a;

echo '-';

}

?>

one-yi-yi/two-er-er/three-san-san/
yi-er-san-

$switching =
array( 10,
// key = 0
5 => 6,
3 => 7,
'a' => 4,
11, // key =
6 (maximum of integer-indices was 5)
'8' => 2, // key =
8 (integer!)
'02' => 77,
// key = '02'
0 => 12 // the value 10 will be overwritten
by 12
);