Retain array elements containing only letters and hyphens

Question

I have the following Array:

Array
(
    [0] => text
    [1] => texture
    [2] => beans
    [3] => 
)

I am wanting to get rid of entries that don't contain a-z or a-z with a dash. In this case, array item 3 (contains just a space).

How would I do this?

Answer 1

Try with:

$input = array( /* your data */ );

function azFilter($var){
    return preg_match('/^[a-z-]+$/i', $var);
}
$output = array_filter($input, 'azFilter');

Also in PHP 5.3 there is possible to simplify it:

$input = array( /* your data */ );

$output = array_filter($input, function($var){
    return preg_match('/^[a-z-]+$/i', $var);
});