Need to get unique values in array

Question

Array
(
)
Array
(
)
Array
(
    [0] => 14
)
Array
(
    [0] => 14
)
Array
(
    [0] => 14
)
Array
(
    [0] => 14
)
Array
(
    [0] => 14
)
Array
(
    [0] => 14
    [1] => 12
)

I want this array

Array
(
    [0] => 14
    [1] => 12
)

Here is my code:

$colorarray = array();
foreach($catIds as $catid){
    $colorarray[] = $catid;
}

Need to get unique array values

Thanks

All those arrays to begin with, are they inside another array? Or are they entirely separate values? — Qirel
– Qirel, Commented May 20, 2019 at 7:14
Look like this is multi-dimension array - that way I answered with array flatten first — dWinder
– dWinder, Commented May 20, 2019 at 7:38

dWinder · Accepted Answer · 2019-05-20 08:07:23Z

3

You can use call_user_func_array with array-merge for flatten your array and then use array-unique as:

$res = call_user_func_array('array_merge', $arr);
print_r(array_unique($res)); // will give 12 and 14

Live example 3v4l

Or as @Progrock suggested: $output = array_unique(array_merge(...$data)); (I like that syntax using the ...)

edited May 20, 2019 at 8:07

answered May 20, 2019 at 7:27

dWinder

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1 Comment

Progrock Over a year ago

Or: $output = array_unique(array_merge(...$data));

Deepak Singh · Accepted Answer · 2019-05-20 07:18:34Z

1

You can always do something like this:

$colorarray = array();
foreach($catIds as $catid){
    if(!in_array($catid, $colorarray) {
       $colorarray[] = $catid;
    }
}

But also this has n*n complexity, So if your array is way too big, it might not be the most optimised solution for you.

answered May 20, 2019 at 7:18

Deepak Singh

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Comments

Niket Joshi · Accepted Answer · 2019-05-20 07:24:55Z

1

You can do following to generate unique array.

array_unique($YOUR_ARRAY_VARIABLE, SORT_REGULAR);

this way only unique value is there in your array instead of duplication.

UPDATED

This is also one way to do same

<?php
 // define array 
 $a = array(1, 5, 2, 5, 1, 3, 2, 4, 5); 

 // print original array 
 echo "Original Array : \n"; 
 print_r($a); 

 // remove duplicate values by using  
 // flipping keys and values 
 $a = array_flip($a); 

 // restore the array elements by again  
 // flipping keys and values. 
 $a = array_flip($a); 

 // re-order the array keys 
 $a= array_values($a); 

 // print updated array 
 echo "\nUpdated Array : \n "; 
 print_r($a); 
?>

Reference link

Hope this will helps you

answered May 20, 2019 at 7:24

Niket Joshi

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1 Comment

mickmackusa Over a year ago

This answer ignores the (different) sample data in the question.

Ronak Chauhan · Accepted Answer · 2019-05-20 07:55:03Z

1

I have updated your code please check

$colorarray = array();
foreach($catIds as $catid){
    $colorarray[$catid] = $catid;
}

This will give you 100% unique values.

answered May 20, 2019 at 7:55

Ronak Chauhan

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1 Comment

mickmackusa Over a year ago

I recommend using this adjustment to your original code. It has the lowest possible time complexity and makes no iterated function calls. When the loop finishes, you can call array_values() on $colorarray to remove the temporary keys.

Chanaka Weerasinghe · Accepted Answer · 2019-05-20 07:32:31Z

0

PHP: Removes duplicate values from an array

<?php
$fruits_list = array('Orange',  'Apple', ' Banana', 'Cherry', ' Banana');
$result = array_unique($fruits_list);
print_r($result);
?>

------your case--------

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

answered May 20, 2019 at 7:32

Chanaka Weerasinghe

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Comments

Progrock · Accepted Answer · 2019-05-20 07:51:12Z

0

You can construct a new array of all values by looping through each sub-array of the original, and then filter the result with array_unique:

<?php
$data =
[
    [
        0=>13
    ],
    [
        0=>13
    ],
    [
        0=>17,
        1=>19
    ]
];

foreach($data as $array)
    foreach($array as $v)
        $all_values[] = $v;

var_export($all_values);
$unique = array_unique($all_values);
var_export($unique);

Output:

array (
    0 => 13,
    1 => 13,
    2 => 17,
    3 => 19,
  )array (
    0 => 13,
    2 => 17,
    3 => 19,
  )

answered May 20, 2019 at 7:51

Progrock

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