php get index in foreach

1$index = 0;
2foreach($data as $key=>$val) {
3    // Use $key as an index, or...
4
5    // ... manage the index this way..
6    echo "Index is $index\n";
7    $index++;
8}

1$array = array('a', 'b', 'c');
2foreach ($array as $letter=>$index) {
3
4  echo $letter; //Here $letter content is the actual index
5  echo $array[$letter]; // echoes the array value
6
7}//foreach
8
9