Translating this Pseudo-code into PHP

I am trying to code a function that basically gets a "property" from a sentence. These are the parameters.

$q = "this apple is of red color"; OR $q = "this orange is of orange color";
$start = array('this apple', 'this orange');
$end = array('color', 'color');

and this is the function I am trying to make:

function prop($q, $start, $end)
{
   /*
    if $q (the sentence) starts with any of the $start
    and/or ends with any of the end
    separate to get "is of red"
   */

}

not only am I having problems with the code itself, I am also not sure how to search that if any of the array values start with (not just contains) the $q provided.

Any input would be helpful. Th开发者_如何学Canks

Something like this should work

function prop($q, $start, $end) {
  foreach ($start as $id=>$keyword) {
    $res = false;
    if ((strpos($q, $keyword) === 0) && (strrpos($q, $end[$id]) === strlen($q) - strlen($end[$id]))) {
      $res = trim(str_replace($end[$id], '', str_replace($keyword, '', $q)));
      break;
      }
    }
  return $res;
  }

So in your case this code

$q = "this orange is of orange color";
echo prop($q, $start, $end);

prints

is of orange

and this code

$q = "this apple is of red color"; 
echo prop($q, $start, $end);

prints

is of red

This code

$start = array('this apple', 'this orange', 'my dog');
$end = array('color', 'color', 'dog');

$q = "my dog is the best dog"; 
echo prop($q, $start, $end);

will return

is the best

Use strpos and strrpos. If they return 0 the string is at the very beginning/end.

Not that you have to use === 0 (or !== 0 for the inverse) to test since they return false if the string was not found and 0 == false but 0 !== false.