Check if exists the same value in multidimensional array PHP

Question

Let's say i have an array like this:

$array = array(
  0 => 
    array (
      'value' =>  '1' ,
      'name' =>  'dasdfa sadfa' ),

   1=> Array (
      'value' =>  '[email protected]' ,
      'name' =>  'd2' ),
  21 => 
    array(
      'value' =>  '[email protected]' ,
      'name' =>  'name1`' ),

  23 => 
    array(
      'value' =>  '[email protected]' ,
      'name' =>  'POPESCU CATALINA' ),
  24 => 
    array(
      'value' =>  '[email protected]' ,
      'name' =>  'POPESCU CATALINA' ),

  26 => 
    array(
      'value' =>  '[email protected]',
      'name' =>  '43414 Test01'),
  27 => 
    array(
      'value' =>  '[email protected]',
      'name' =>  'oct oct' )

);

I want to know if exists duplicated value in array with key 'value' I know how to do this if i want a specified value but general no. The result must be an array with no duplicated values(eg:

    $array = array(
  0 => 
    array (
      'value' =>  '1' ,
      'name' =>  'dasdfa sadfa' ),

   1=> Array (
      'value' =>  '[email protected]' ,
      'name' =>  'd2' ),

  23 => 
    array(
      'value' =>  '[email protected]' ,
      'name' =>  'POPESCU CATALINA' ),

  26 => 
    array(
      'value' =>  '[email protected]',
      'name' =>  '43414 Test01'),
  27 => 
    array(
      'value' =>  '[email protected]',
      'name' =>  'oct oct' )

);`

Please help me.

This is my try

function has_dupes($array){
 $dupe_array = array();
 foreach($array as $val){
  if(++$dupe_array[$val] > 1){
   return true;
  }
 }
 return false;
}

please share what you tried then we can help you in modify that with better way.... — Naincy
– Naincy, Commented Nov 12, 2014 at 9:40
I want to remove the key from "main array" if value from key 'value' is duplicated. — OsomA
– OsomA, Commented Nov 12, 2014 at 10:10

Ashique C M · Accepted Answer · 2014-11-12 10:11:03Z

2

Try this way:

    $array = array(
  '0' => 
    array (
      'value' =>  '1' ,
      'name' =>  'dasdfa sadfa' ),

   '1'=> Array (
      'value' =>  '[email protected]' ,
      'name' =>  'd2' ),
  '21' => 
    array(
      'value' =>  '[email protected]' ,
      'name' =>  'name1`' ),

  '23' => 
    array(
      'value' =>  '[email protected]' ,
      'name' =>  'POPESCU CATALINA' ),
  '24' => 
    array(
      'value' =>  '[email protected]' ,
      'name' =>  'POPESCU CATALINA' ),

  '26' => 
    array(
      'value' =>  '[email protected]',
      'name' =>  '43414 Test01'),
  '27' => 
    array(
      'value' =>  '[email protected]',
      'name' =>  'oct oct' )

);
$array = array_map("unserialize", array_unique(array_map("serialize", $array)));

edited Nov 12, 2014 at 10:11

answered Nov 12, 2014 at 10:00

Ashique C M

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5 Comments

OsomA Over a year ago

This is not ok because when i have two values equal but name different doesn't eliminate this!

Ashique C M Over a year ago

This is to eliminate duplicate array, if u want to eliminate duplicate with value then use array_filter php.net/manual/en/function.array-filter.php

OsomA Over a year ago

I don't understand how to use array_filter with your solution

Ashique C M Over a year ago

you can define some user defined function which will callback in array_filter. i.e array_filter($array, 'your_function')

OsomA Over a year ago

Oky that i understood, but the problem is the user callback. I don't really know how to make this :(

BSeitkazin · Accepted Answer · 2014-11-12 10:16:07Z

1

$result = array_unique($array);
print_r($result);

And if you want to store all unique data in one array do it like this:

//declare $array
$unique_array = array();
foreach ($array as  $key => $type) {
    foreach($type as $vale => $name) {
        if ($vale == 'value') {
            //echo $name . '<br>';
            array_push($unique_array, $name);
        }
    }
}
$result = array_unique($unique_array);
foreach ($result as $res) {
    echo $res . '<br>';
}

edited Nov 12, 2014 at 10:16

answered Nov 12, 2014 at 9:46

BSeitkazin

3,10927 silver badges41 bronze badges

4 Comments

BSeitkazin Over a year ago

@OsomA, you didn't exactly say what you want if there some the same data!

OsomA Over a year ago

I want to remove the key from main array, you can see the example up!

OsomA Over a year ago

Thank you, it is ok, but now what i need, i will rewrite myself

BSeitkazin Over a year ago

Yeap, this is the main idea, understand your "stack" moment, keep in mind, and resolve it by yourself

vanarajcs · Accepted Answer · 2014-11-19 12:02:53Z

1

Try this

$values = array_map("unserialize", array_unique(array_map("serialize", $array)));

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

print_r($values);

edited Nov 19, 2014 at 12:02

answered Nov 12, 2014 at 10:44

vanarajcs

9782 gold badges7 silver badges18 bronze badges

Comments

guest · Accepted Answer · 2014-11-12 11:18:46Z

0

$unique_data = array(); // the result array
$duplicate_data = array();

$seen = array();
foreach ($array as $key => $arr) {
    $value = $arr['value'];
    if (!isset($seen[$value])) {
        $seen[$value] = '';
        $unique_data[$key] = $arr;
    } else {
        $duplicate_data[$key] = $arr; // optional
    }
}
unset($seen); // optional in function scope

answered Nov 12, 2014 at 11:18

guest

1

2 Comments

Our Man in Bananas Over a year ago

please add some explanation of what your code does and how it solves the problem, this will help others in the future

guest Over a year ago

The code is self-explanatory. But it simply builds a new array, omitting duplicates which occur later.

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