Dotan Cohen wrote:
> Consider the situation where an application will use a different set
> of PDO connection details depending on which version of the site is
> running: production, dev, qa, cron job, etc. Considering that
> $_SERVER['DOCUMENT_ROOT'] may not be set, is this check sufficient:
>
> if ( !isset( !isset($connection_details[$_SERVER['DOCUMENT_ROOT']]) ) {
>
> Or would it be preferable to first check that
> $_SERVER['DOCUMENT_ROOT'] is set before relying on it:
>
> if ( !isset($_SERVER['DOCUMENT_ROOT']) ||
> !isset($connection_details[$_SERVER['DOCUMENT_ROOT']]) ) {
>
> The TRUE case of this if clause will simply use the default connection details:
> $connection_details[0]
Then you might consider using the following:
$index = isset($_SERVER['DOCUMENT_ROOT'])
? $_SERVER['DOCUMENT_ROOT'] : 0;
do_something_with($connection_details[$index]);
BTW: after upgrading to PHP 7 you could use the null coalesce operator[1]:
$index = $_SERVER['DOCUMENT_ROOT'] ?? 0;
[1] <https://wiki.php.net/rfc/isset_ternary>
--
Christoph M. Becker
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