Question

I want to combine values from an array to be output into another array as a single flattened value rather than another array. My problem is the final output is always another array, while what I need is to append the other value into the first value using a dash (-), and so on depending on its presence:

If all is present, should output a-b-c, if two of either combination = a-b, a-c, b-c, otherwise simply a or b or c

  $classes = array('a', 'b', 'c');

  foreach ($classes as $class) {
    if (!empty($block[$class])) {
      // If all is present, should output a-b-c, if two = a-b, a-c, b-c, otherwise simply a or b or c
      $variables['classes_array'][] = ....;
    }
  }

Answer 1

I think this would do what you want:

$classes = array( 'a', 'b', 'c' );

$variables = array();

foreach( $classes as $class ) {

    if( in_array( $class, $block ) ){
        $variables[] = $class;
    }

}

$variables  = implode( '-', $variables );

echo $variables;