Need to get unique values in array - php

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

Answer 1

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 ...)

Answer 2

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.

Answer 3

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

Answer 4

I have updated your code please check
$colorarray = array();
foreach($catIds as $catid){
$colorarray[$catid] = $catid;
}
This will give you 100% unique values.

Answer 5

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);

Answer 6

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,
)