How can I get the duplicate multidimensional array in php

Question 1

I have an multidimensional array:

   Array
(
    [0] => Array
        (
            [a] => 1
            [b] => 2
            [c] => 3
            [d] => 4
        )

    [1] => Array
        (
            [a] => 1
            [b] => 5
            [c] => 3
            [d] => 4
        )

    [2] => Array
        (
            [a] => 1
            [b] => 2
            [c] => 3
            [d] => 4
        )

)

Look at the first index (or zero) and third index (number two index), the values in a,b,c,d is equal 1,2,3,4. Assuming that the array is equal, or no different of them; my question is, how can I catch the array which equal, my purpose to show users about the value input duplicate,

I have already been using array_unique. This is the result :

    Array
(
    [0] => Array
        (
            [a] => 1
            [b] => 2
            [c] => 3
            [d] => 4
        )

    [1] => Array
        (
            [a] => 1
            [b] => 5
            [c] => 3
            [d] => 4
        )

)

But I just want to get duplicate data, not remove the data duplicate.

// first : get all data, if the data same / duplicate take only one data

$unique = array_unique($data, SORT_REGULAR);

// then, get the data which duplicate with

$diffCellUniq = array_diff_key($data, $unique);

// so print the result 

print_r($diffCellUniq); exit;



   Array
(
    [2] => Array
        (
            [a] => 1
            [b] => 2
            [c] => 3
            [d] => 4
        )

)

Question 2

// first : get all data, if the data same / duplicate take only one data

$unique = array_unique($data, SORT_REGULAR);

// then, get the data which duplicate with

$diffCellUniq = array_diff_key($data, $unique);

// so print the result

print_r($diffCellUniq); exit;

Array
(
    [2] => Array
        (
            [a] => 1
            [b] => 2
            [c] => 3
            [d] => 4
        )

)

Question 3

SVN keywords is not a good solution. As others pointed out adding $Revision$ in a file only affects the specific file, which may not change for a long time.

Remembering to "edit" a file (by adding or removing a blank line) before every commit is pointless. You could as well just type the revision by hand.

One good way to do it (that I know of) is to have an automated deployment process (which is always a good thing) and using the command svnversion. Here is what I do:

Wherever I need the revision I do an include: <?php include 'version.php'; ?>. This "version.php" file only has the revision number. Moreover it is not part of the repository (it set to be ignored). Here is how I create it:

1) On projects where SVN is installed on the server, I also use it for deployment. Getting the latest version to the server I have a script that among other things does the following (it runs on the server):

cd /var/www/project
svn update
rm version.php
svnversion > version.php

2) On projects where SVN is not installed my deployment script is more complex: it creates the version.php file locally, zips the code, uploads and extracts it

Question 4

If I am understanding this correctly:

Returning a new array:

$array_new = [];
foreach($array_two as $key)
{
    if(array_key_exists($key, $array_one))
    {
        $array_new[$key] = $array_one[$key];
    }
}

Stripping from $array_one:

foreach($array_one as $key => $val)
{
    if(array_search($key, $array_two) === false)
    {
        unset($array_one[$key]);
    }
}

Question 5

The solution using array_uintersect_uassoc function:

$result = array_uintersect_uassoc($array_1_data, $array_2_data, function($a, $b){
    return strcasecmp($a['id'], $b['cid']);
}, function($a, $b){
    return (int) [$a, $b] == ['id', 'cid'];
});

print_r($result);

The output:

Array
(
    [0] => Array
        (
            [id] => 1
            [name] => IT
            [slug] => it
        )
)

According yo your condition: to intersect these two arrays by [id] of the first array and [cid] of the second array, we should consider a key comparison function for those keys only ['id', 'cid'].
Having the needed keys on each comparison step it only remain to compare their values(with value compare function)

http://php.net/manual/en/function.array-uintersect-uassoc.php

DEMO link

Question 6

In PHP 5.5:

$rgResult = array_column($foo, 'clientId');

in PHP <=5.5:

$rgResult = array_map(function($rgItem)
{
  return $rgItem['clientId'];
}, $foo);

(put <= since this, of cause, will work in 5.5 too)

How can I get the duplicate multidimensional array in php

Answers

php,arrays,multidimensional-array,duplicates,array-intersect