在数组的字符串中设置参数

Question

I have a function language($tag) that requires a file lang.php which contains an array called $lang which contains some parameters. In particular a string $lang['message']. After some execution lines it returns $lang['message'].

The $lang array is defined as follows:

$lang[$tag] = array(
    'message' => 'This is a message',
    ...
);

Now let's say I'd like to be able to set parameters inside $lang['message'] that I should be able to define on language($tag, $parameters). And these parameters should set a var inside $lang['message'] such as:

$lang[$tag] = array(
    'message' => 'This is a '. $1,
    ...
);

How is the best way of organize language($tag, $parameters) so that what is in $parameters sets $1 in $lang['message']?

If you didn't understand I'd like to be able to call language($tag, 'post') and make it return 'This is a post'.

Answer 1

How about saving the strings as printf templates, eg

$lang[$tag] = array(
    'message' => 'This is a %s'
);

You can then use vsprintf to pass an array of value substitutions, eg

function language($tag, array $values)
{
    // get $lang from somewhere

    return vsprintf($lang[$tag]['message'], $values);
}