Zend Framework Coding Standards

[cancer10]

Hello

I was going through the Zend Framework Coding Standards and was unable to understand the meaning of the following lines, please if someone can explain them to me with example if possible.

1. An indexed array may start with any non-negative number, however all base indices besides 0 are discouraged.
2. The construct default should never be omitted from a switch statement

Many thanks

[TFlan]

An indexed array may start with any non-negative number, however all base indices besides 0 are discouraged.

An array CAN NOT start with any negative number, and any array SHOULD start with an index of 0.

IE:
Do Not Do:

PHP Code:

<?php
$var = array(
    [-4] => 'Hello',
    [-3] => 'World'
);
?>

Do:

PHP Code:

<?php
$var = array(
    [a] => 'Hello',
    [b] => 'World'
);
?>

Recommended:

PHP Code:

<?php
$var = array(
    [0] => 'Hello',
    [1] => 'World'
);
?>

The construct default should never be omitted from a switch statement

Do not leave out the default option in any switch.

IE:
Do Not Do:

PHP Code:

<?php
switch($var){
    case 'a':
        break;
    case 'b':
        break;
}
?>

Do:

PHP Code:

<?php
switch($var){
    case 'a':
        break;
    case 'b':
        break;
    default:
        break;
}
?>

[cancer10]

Thanks so much for the explanation TFlan, so

1) indices means index, right?

2) what does "base indices" here mean?

[TFlan]

Correct, indices is plural for index.

"Base indices" means just what it says. The base index.

IE:
Not Recommended:

PHP Code:

<?php
$var = array(11 => 'a', 'b', 'c');
?>

Recommended:

PHP Code:

<?php
$var = array(0 => 'a', 'b', 'c');
?>

The first example would assign the index of 11 to a, 12 to b, 13 to c.
The second example would assign the index of 0 to a, 1 to b, 2 to c.

"Thanks for the further clarification."
You're very welcome

[cancer10]

Thanks for the further clarification.