Question

I have this array

$arr = array('test1', 'test', 'test3', 'var1', 'var5', 'var');

and I want to trim/sort the array to be like this

$arr = array('test', 'var');

Answer 1

This question is a little vague; it sounds to me like you’re asking how to filter out the elements that do not contain a digit, and the provided $arr is just an example. In which case you can do the following:

$arr = array('test1', 'test', 'test3', 'var1', 'var5', 'var');

function filter($element)
{
  if (ctype_alpha($element)) return $element;
}

$output = array_filter($arr, 'filter');

This will also work if your array changes. If you need to sort the results alphabetically, then:

natcasesort($output);

I could be wrong though; in which case this is slightly overkill.