explode function instructions

// Example 1
$pizza = "piece1 piece2 piece3 piece4 piece5 piece6";
$pieces = explode(" ", $pizza);
echo $pieces[ 0]; // piece1
echo $pieces[1]; // piece2
// Example 2
$data = "foo:*:1023:1000::/home/foo:/ bin/sh";
list($user, $pass, $uid, $gid, $gecos, $home, $shell) = explode(":", $data);
echo $user; // foo
echo $pass; // *
?>

Example 2. limit parameter example

$str = 'one|two|three|four';
// Positive limit
print_r(explode( '|', $str, 2));
// Negative limit (since PHP 5.1)
print_r(explode('|', $str, -1));
 ?>

The above example will output: Array ( [0] => one [1] => two|three|four ) Array ( [0] => one [1] => two [2] => three )