PHP:Check duplicate values in all nested array

Question

I would like to find out a duplicate value in the all nested arrays within an array. At the moment my array is something like that.

Array $bigarray = Array (
    [431] => Array (
        [0] => orange 
        [1] => apple 
        [2] => pine
    ) 
    [440] => Array ( 
        [0] => orange 
        [1] => lilly 
    ) 
    [444] => Array (  
        [0] => orange 
        [1] => pine 
    ) 
)

I would like to extract only orange which is in all

arrays('431','440','444').

Woudl you give me some idea...? Thanks in advance.

dorsh · Accepted Answer · 2012-02-03 13:04:16Z

10

You can use array_intersect():

$intersected = null;
foreach ($bigarray as $arr) {
  $intersected = $intersected ? array_intersect($arr, $intersected) : $arr;
  if (!$intersected) {
    break; // no reason to continue
  }
}
print_r($intersected);

Array
(
  [0] => orange
)

edited Feb 3, 2012 at 13:04

answered Feb 3, 2012 at 12:57

dorsh

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1 Comment

user973067 Over a year ago

thanks this is exactly what I wanted!! by the way i want to know how to delete the extracted items from all the arrays. i tried foreach ($clauses as $arr){..unset.} but no luck.

Mark Baker · Accepted Answer · 2012-02-03 13:26:25Z

2

$inAllChunks = call_user_func_array('array_intersect',(array_values($bigarray)));
var_dump($inAllChunks);

answered Feb 3, 2012 at 13:26

Mark Baker

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Comments

hsz · Accepted Answer · 2012-02-03 12:58:11Z

1

$output = null;

foreach ( $bigarray as $array ) {
  if ( is_null($output) ) {
    $output = $array;
    continue;
  }

  $output = array_intersect($output, $array);
  if ( empty($output) ) {
    break;
    // there are no common elements in the array
  }
}

var_dump$(output);

answered Feb 3, 2012 at 12:58

hsz

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Comments

thenetimp · Accepted Answer · 2012-02-03 13:01:35Z

1

From the documentation.

$array1 = array("a" => "green", "red", "blue");  
$array2 = array("b" => "green", "yellow", "red");
$result = array_intersect($array1, $array2);
print_r($result);

http://www.php.net/manual/en/function.array-intersect.php

answered Feb 3, 2012 at 13:01

thenetimp

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