CODEWITHSUNDEEP
php
user973067
user973067

Reputation: 337

PHP: Delete values from nested arrays

I am extracting duplicated values from nested arrays. I would like to delete these extraceted items from the $bigarray. would you give me some ideas...?

$bigarray = array(                                                                                                                                                                                                                                                          
    "430" => array('milk', 'turky', 'apple'),
    "433" => array('milk', 'apple', 'orange', 'england'),
    "444" => array('milk', 'apple', 'orange', 'spain')
);
$intersected = null;
foreach ($bigarray as $arr) {
  $intersected = $intersected ? array_intersect($arr, $intersected) : $arr;
  if (!$intersected) {
    break; // no reason to continue
  }
}


foreach ($intersected as $inter){
  foreach ($bigarray as $arr) { 
    foreach ($arr as $value=>$key) {
      if ($key ==  $inter){
        unset($arr[$value]);
      }
    }
  //print_r($arr);
  }
}
print_r($bigarray );

Upvotes: 1

Views: 299

Answers (5)

user1062893
user1062893

Reputation: 89

You can use the array_unique($array,[, int $sort_flags] function. if you don't specify the optional sort_flag, the function will compare values converting everything to string. if you have values other than string in the array, you can specify sort_flag to be one of the following values

SORT_REGULAR - compare items normally (don't change types)
SORT_NUMERIC - compare items numerically
SORT_STRING - compare items as strings
SORT_LOCALE_STRING - compare items as strings, based on the current locale.

Example from PHP.net

         $input = array("a" => "green", "red", "b" => "green", "blue", "red");
         $result = array_unique($input);
         print_r($result);

for more information refer http://php.net/manual/en/function.array-unique.php

Upvotes: 0

Adam Fowler
Adam Fowler

Reputation: 1751

function array_unique_nested($arr=array(),$matched=array(),$cm=false){
foreach($arr as $i=>$v){
if (is_array($v)) {$arr[$i]=array_unique_nested($v,$matched,false);
$matched=array_unique_nested($v,$matched,true); continue;}
if (in_array($v,$matched)) {unset($arr[$i]);continue;}
$matched[]=$v;}
if ($cm) return $matched;
else return $arr;}

In case that doesn't work, this code snippet from http://php.net/manual/en/function.array-unique.php should do the trick.

if( !function_exists( 'array_flat' ) )
{
    function array_flat( $a, $s = array( ), $l = 0 )
{
    # check if this is an array
    if( !is_array( $a ) )                           return $s;

    # go through the array values
    foreach( $a as $k => $v )
    {
        # check if the contained values are arrays
        if( !is_array( $v ) )
        {
            # store the value
            $s[ ]       = $v;

            # move to the next node
            continue;

        }

        # increment depth level
        $l++;

        # replace the content of stored values
        $s              = array_flat( $v, $s, $l );

        # decrement depth level
        $l--;

    }

    # get only unique values
    if( $l == 0 ) $s = array_values( array_unique( $s ) );

    # return stored values
    return $s;

} # end of function array_flat( ...

}

Upvotes: 0

DaneoShiga
DaneoShiga

Reputation: 1027

I don't completely understood your question, but using array_unique() in your array I've got the following output:

array(1) {
  [430]=>
  array(3) {
    [0]=>
    string(4) "milk"
    [1]=>
    string(5) "turky"
    [2]=>
    string(5) "Apple"
  }
}

Maybe this could be a way of acchieving what you want.

Upvotes: 0

webnoob
webnoob

Reputation: 15934

You should look at array_merge as it will merge 2 arrays together and only keep one duplicate. From the manual:

If the input arrays have the same string keys, then the later value for that key will overwrite the previous one. If, however, the arrays contain numeric keys, the later value will not overwrite the original value, but will be appended.

Sounds like homework and the question isn't very clear so that is all I can provide for now.

Upvotes: 1

Rezigned
Rezigned

Reputation: 4922

Is this what you're looking for?

foreach($bigarray as $id => $arr)
    $bigarray[$id] = array_unique($arr);

Upvotes: 0

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