php remove duplicates from array

Question

I was wondering if anyone could help me out, I\'m trying to find a script that will check my entire array and remove any duplicates if required, then spit out the array in t

Answer 1

Try this, it works with large arrays:

$original = array('one', 'two', 'three', 'four', 'five', 'two', 'four');
$filtered = array();
foreach ($original as $key => $value){
    if(in_array($value, $filtered)){
        continue;
    }
    array_push($filtered, $value);
}

print_r($filtered);

Outputs:

Array
(
    [0] => one
    [1] => two
    [2] => three
    [3] => four
    [4] => five
)

Answer 2

stop using your own array splitting function that causes duplicates and read the php manual page on array_chunk

Answer 3

My PHP's rusty, but something like this should work:

function makeUniqueBidArray(&$array)
{
  $tempArray = array();
  foreach($array as $bidArray) {
    foreach($bidArray as $bid) {
      if (isset($tempArray[$bid->bid]) {
        unset($bid);
      } else {
        $tempArray[$bid->bid] = $bid->name;
      }
    }
  }
}

Answer 4

Use the array_unique function.

Here is an implentation of a multi-dimensional array_unique function.

function super_unique($array)
{
  $result = array_map("unserialize", array_unique(array_map("serialize", $array)));

  foreach ($result as $key => $value)
  {
    if ( is_array($value) )
    {
      $result[$key] = super_unique($value);
    }
  }

  return $result;
}

Not tested, from the comments in the function manual.

Answer 5

You can remove duplicates from an array by doing:

$array = array_values(array_unique($array));