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<?php
function custombuttons_generate_children(&$options, $a, $m, $k) {
  $mcount = count($m);
  if (empty($options[$a[$k]])) {
    foreach ($m as $key => $label) {
      $new_key = implode('_', array($k, $key));
      $new_label = implode('+', array($label, $a[$k]));
      $options[$a[$k]][$new_key] = $new_label;
    }
  }
  else {
    foreach ($options[$a[$k]] as $key => $label) {
      foreach ($m as $mkey => $mlabel) {
        if (!strpos($key, '_' . $mkey)) {
          $new_key = implode('_', array($key, $mkey));
          $new_label = implode('+', array($mlabel, $label));
          $options[$a[$k]][$new_key] = $new_label;
        }
      }
    }
  }
  $last = end(array_keys($options[$a[$k]]));
  if (count(explode('_', $last)) !== $mcount) {
    custombuttons_generate_children($options, $a, $m, $k);
  }
}
 
function custombuttons_action_options_list() {
  $a = array(
    'left' => 'LEFT',
    'middle' => 'MIDDLE',
    'right' => 'RIGHT',
  );
  $m = array( // modifiers
    'ctrl' => 'CTRL',
    'alt' => 'ALT',
    'shift' => 'SHIFT',
    'double' => 'DOUBLE',
  );
  foreach ($a as $key => $label) {
    $options[$key] = $label;
    $options[$label] = array();
    custombuttons_generate_children($options, $a, $m, $key);
  }
print_r($options);
}
custombuttons_action_options_list();
?>

Success #stdin #stdout 0.03s 13112KB

stdin

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Standard input is empty

stdout

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Array
(
    [left] => LEFT
    [LEFT] => Array
        (
            [left_ctrl] => CTRL+LEFT
            [left_alt] => ALT+LEFT
            [left_shift] => SHIFT+LEFT
            [left_double] => DOUBLE+LEFT
            [left_ctrl_alt] => ALT+CTRL+LEFT
            [left_ctrl_shift] => SHIFT+CTRL+LEFT
            [left_ctrl_double] => DOUBLE+CTRL+LEFT
            [left_alt_ctrl] => CTRL+ALT+LEFT
            [left_alt_shift] => SHIFT+ALT+LEFT
            [left_alt_double] => DOUBLE+ALT+LEFT
            [left_shift_ctrl] => CTRL+SHIFT+LEFT
            [left_shift_alt] => ALT+SHIFT+LEFT
            [left_shift_double] => DOUBLE+SHIFT+LEFT
            [left_double_ctrl] => CTRL+DOUBLE+LEFT
            [left_double_alt] => ALT+DOUBLE+LEFT
            [left_double_shift] => SHIFT+DOUBLE+LEFT
            [left_ctrl_alt_shift] => SHIFT+ALT+CTRL+LEFT
            [left_ctrl_alt_double] => DOUBLE+ALT+CTRL+LEFT
            [left_ctrl_shift_alt] => ALT+SHIFT+CTRL+LEFT
            [left_ctrl_shift_double] => DOUBLE+SHIFT+CTRL+LEFT
            [left_ctrl_double_alt] => ALT+DOUBLE+CTRL+LEFT
            [left_ctrl_double_shift] => SHIFT+DOUBLE+CTRL+LEFT
            [left_alt_ctrl_shift] => SHIFT+CTRL+ALT+LEFT
            [left_alt_ctrl_double] => DOUBLE+CTRL+ALT+LEFT
            [left_alt_shift_ctrl] => CTRL+SHIFT+ALT+LEFT
            [left_alt_shift_double] => DOUBLE+SHIFT+ALT+LEFT
            [left_alt_double_ctrl] => CTRL+DOUBLE+ALT+LEFT
            [left_alt_double_shift] => SHIFT+DOUBLE+ALT+LEFT
            [left_shift_ctrl_alt] => ALT+CTRL+SHIFT+LEFT
            [left_shift_ctrl_double] => DOUBLE+CTRL+SHIFT+LEFT
            [left_shift_alt_ctrl] => CTRL+ALT+SHIFT+LEFT
            [left_shift_alt_double] => DOUBLE+ALT+SHIFT+LEFT
            [left_shift_double_ctrl] => CTRL+DOUBLE+SHIFT+LEFT
            [left_shift_double_alt] => ALT+DOUBLE+SHIFT+LEFT
            [left_double_ctrl_alt] => ALT+CTRL+DOUBLE+LEFT
            [left_double_ctrl_shift] => SHIFT+CTRL+DOUBLE+LEFT
            [left_double_alt_ctrl] => CTRL+ALT+DOUBLE+LEFT
            [left_double_alt_shift] => SHIFT+ALT+DOUBLE+LEFT
            [left_double_shift_ctrl] => CTRL+SHIFT+DOUBLE+LEFT
            [left_double_shift_alt] => ALT+SHIFT+DOUBLE+LEFT
        )

    [middle] => MIDDLE
    [MIDDLE] => Array
        (
            [middle_ctrl] => CTRL+MIDDLE
            [middle_alt] => ALT+MIDDLE
            [middle_shift] => SHIFT+MIDDLE
            [middle_double] => DOUBLE+MIDDLE
            [middle_ctrl_alt] => ALT+CTRL+MIDDLE
            [middle_ctrl_shift] => SHIFT+CTRL+MIDDLE
            [middle_ctrl_double] => DOUBLE+CTRL+MIDDLE
            [middle_alt_ctrl] => CTRL+ALT+MIDDLE
            [middle_alt_shift] => SHIFT+ALT+MIDDLE
            [middle_alt_double] => DOUBLE+ALT+MIDDLE
            [middle_shift_ctrl] => CTRL+SHIFT+MIDDLE
            [middle_shift_alt] => ALT+SHIFT+MIDDLE
            [middle_shift_double] => DOUBLE+SHIFT+MIDDLE
            [middle_double_ctrl] => CTRL+DOUBLE+MIDDLE
            [middle_double_alt] => ALT+DOUBLE+MIDDLE
            [middle_double_shift] => SHIFT+DOUBLE+MIDDLE
            [middle_ctrl_alt_shift] => SHIFT+ALT+CTRL+MIDDLE
            [middle_ctrl_alt_double] => DOUBLE+ALT+CTRL+MIDDLE
            [middle_ctrl_shift_alt] => ALT+SHIFT+CTRL+MIDDLE
            [middle_ctrl_shift_double] => DOUBLE+SHIFT+CTRL+MIDDLE
            [middle_ctrl_double_alt] => ALT+DOUBLE+CTRL+MIDDLE
            [middle_ctrl_double_shift] => SHIFT+DOUBLE+CTRL+MIDDLE
            [middle_alt_ctrl_shift] => SHIFT+CTRL+ALT+MIDDLE
            [middle_alt_ctrl_double] => DOUBLE+CTRL+ALT+MIDDLE
            [middle_alt_shift_ctrl] => CTRL+SHIFT+ALT+MIDDLE
            [middle_alt_shift_double] => DOUBLE+SHIFT+ALT+MIDDLE
            [middle_alt_double_ctrl] => CTRL+DOUBLE+ALT+MIDDLE
            [middle_alt_double_shift] => SHIFT+DOUBLE+ALT+MIDDLE
            [middle_shift_ctrl_alt] => ALT+CTRL+SHIFT+MIDDLE
            [middle_shift_ctrl_double] => DOUBLE+CTRL+SHIFT+MIDDLE
            [middle_shift_alt_ctrl] => CTRL+ALT+SHIFT+MIDDLE
            [middle_shift_alt_double] => DOUBLE+ALT+SHIFT+MIDDLE
            [middle_shift_double_ctrl] => CTRL+DOUBLE+SHIFT+MIDDLE
            [middle_shift_double_alt] => ALT+DOUBLE+SHIFT+MIDDLE
            [middle_double_ctrl_alt] => ALT+CTRL+DOUBLE+MIDDLE
            [middle_double_ctrl_shift] => SHIFT+CTRL+DOUBLE+MIDDLE
            [middle_double_alt_ctrl] => CTRL+ALT+DOUBLE+MIDDLE
            [middle_double_alt_shift] => SHIFT+ALT+DOUBLE+MIDDLE
            [middle_double_shift_ctrl] => CTRL+SHIFT+DOUBLE+MIDDLE
            [middle_double_shift_alt] => ALT+SHIFT+DOUBLE+MIDDLE
        )

    [right] => RIGHT
    [RIGHT] => Array
        (
            [right_ctrl] => CTRL+RIGHT
            [right_alt] => ALT+RIGHT
            [right_shift] => SHIFT+RIGHT
            [right_double] => DOUBLE+RIGHT
            [right_ctrl_alt] => ALT+CTRL+RIGHT
            [right_ctrl_shift] => SHIFT+CTRL+RIGHT
            [right_ctrl_double] => DOUBLE+CTRL+RIGHT
            [right_alt_ctrl] => CTRL+ALT+RIGHT
            [right_alt_shift] => SHIFT+ALT+RIGHT
            [right_alt_double] => DOUBLE+ALT+RIGHT
            [right_shift_ctrl] => CTRL+SHIFT+RIGHT
            [right_shift_alt] => ALT+SHIFT+RIGHT
            [right_shift_double] => DOUBLE+SHIFT+RIGHT
            [right_double_ctrl] => CTRL+DOUBLE+RIGHT
            [right_double_alt] => ALT+DOUBLE+RIGHT
            [right_double_shift] => SHIFT+DOUBLE+RIGHT
            [right_ctrl_alt_shift] => SHIFT+ALT+CTRL+RIGHT
            [right_ctrl_alt_double] => DOUBLE+ALT+CTRL+RIGHT
            [right_ctrl_shift_alt] => ALT+SHIFT+CTRL+RIGHT
            [right_ctrl_shift_double] => DOUBLE+SHIFT+CTRL+RIGHT
            [right_ctrl_double_alt] => ALT+DOUBLE+CTRL+RIGHT
            [right_ctrl_double_shift] => SHIFT+DOUBLE+CTRL+RIGHT
            [right_alt_ctrl_shift] => SHIFT+CTRL+ALT+RIGHT
            [right_alt_ctrl_double] => DOUBLE+CTRL+ALT+RIGHT
            [right_alt_shift_ctrl] => CTRL+SHIFT+ALT+RIGHT
            [right_alt_shift_double] => DOUBLE+SHIFT+ALT+RIGHT
            [right_alt_double_ctrl] => CTRL+DOUBLE+ALT+RIGHT
            [right_alt_double_shift] => SHIFT+DOUBLE+ALT+RIGHT
            [right_shift_ctrl_alt] => ALT+CTRL+SHIFT+RIGHT
            [right_shift_ctrl_double] => DOUBLE+CTRL+SHIFT+RIGHT
            [right_shift_alt_ctrl] => CTRL+ALT+SHIFT+RIGHT
            [right_shift_alt_double] => DOUBLE+ALT+SHIFT+RIGHT
            [right_shift_double_ctrl] => CTRL+DOUBLE+SHIFT+RIGHT
            [right_shift_double_alt] => ALT+DOUBLE+SHIFT+RIGHT
            [right_double_ctrl_alt] => ALT+CTRL+DOUBLE+RIGHT
            [right_double_ctrl_shift] => SHIFT+CTRL+DOUBLE+RIGHT
            [right_double_alt_ctrl] => CTRL+ALT+DOUBLE+RIGHT
            [right_double_alt_shift] => SHIFT+ALT+DOUBLE+RIGHT
            [right_double_shift_ctrl] => CTRL+SHIFT+DOUBLE+RIGHT
            [right_double_shift_alt] => ALT+SHIFT+DOUBLE+RIGHT
        )

)

https://ideone.com/1WDOp

language:

PHP (php 7.3.5)

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public

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