Often after you explode a string, you need to trim the values and discard empty keys.

Here is a simple function to do all that in one step:

/**
 * Explode string, trim, and drop empty keys
 *
 * @param   (string)  $string      - boundary string
 * @param   (string)  $delimiter   - input string
 *
 * @return  (array)
 **/
function explodeClean( $delimiter, $string )
{
  if( !is_string( $delimiter ) || !is_string( $string ) ) return $string;
  $string = explode( $delimiter, $string );
  foreach( $string as $k => $v )
  {
    $v = trim( $v );
    if( $v ) $string[$k] = $v; else unset( $string[$k] );
  }
  return $string;
}

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