The method of removing duplicate items of two-dimensional arrays by PHP _php tips

PHP to go to a one-dimensional array of duplicates can be through the PHP built-in function array_unique (), but the Array_unique function of PHP does not apply to multidimensional arrays, how can you remove duplicates in two-dimensional arrays?

Here's a function for you.

The two-dimensional array removes the duplicate value
function Unique_arr ($array 2d, $stkeep =false, $ndformat =true) {
  $joinstr = ' +++++ ';
  Determines whether or not to preserve the first-order array key (an array key can be non-numeric)
  if ($stkeep) $STARR = Array_keys ($array 2D);
  Determines whether to keep level two array keys (All level two array keys must be the same)
  if ($ndformat) $NDARR = Array_keys (end ($array 2D));
  Dimension reduction, you can also use implode to convert a one-dimensional array to a comma-connected string of
  foreach ($array 2D as $v) {
    $v = join ($JOINSTR, $v);
    $temp [] = $v;
  }
  Remove the duplicate string, which is the repeating one-dimensional array
  $temp = Array_unique ($temp);
  The disassembled array is then reassembled with the
  foreach ($temp as $k => $v) {
    if ($stkeep) $k = $STARR [$k];
    if ($ndformat) {
      $TEMPARR = explode ($joinstr, $v);
      foreach ($tempArr as $ndkey => $ndval) $output [$k] [$NDARR [$ndkey]] = $ndval;
    }
    else $output [$k] = explode ($joinstr, $v);
  return $output;
}

I hope to learn from the PHP program to help you.