How can i check the unique key and value in this array - php

Question

Array (
[0] => Array ( [2] => 3 )
[1] => Array ( [12] => 32 )
[2] => Array ( [2] => 3 )
[3] => Array ( [24] => 42 )
);
How can i get the output as unique key value. I need to remove the duplicate values.
I need the o/p like this
Array (
[0] => Array ( [2] => 3 )
[1] => Array ( [12] => 32 )
[2] => Array ( [24] => 42 )
);

Answer 1

array_reduce is likely designed for this purpose:
$a = [ [ 2 => 3 ], [ 3 => 4 ], [ 3 => 15 ], [ 2 => 3 ] ];
array_reduce($a, function($memo, $el) {
if(false === array_search($el, $memo)) array_push($memo, $el);
return $memo;
}, array())
#⇒ array(3) {
# [0] =>
# array(1) {
# [2] =>
# int(3)
# }
# [1] =>
# array(1) {
# [3] =>
# int(4)
# }
# [2] =>
# array(1) {
# [3] =>
# int(15)
# }
#}

Answer 2

Try this:
$array = array(
array(2 => 3),
array(12 => 32),
array(2 => 3),
array(24 => 32)
);
echo 'before array_unique_multi:' . "\n";
print_r($array);
echo 'after array_unique_multi:' . "\n";
print_r(array_unique_multi($array));
function array_unique_multi($array)
{
$hashAry = array();
foreach($array as $k=>$v){
$hash = md5(serialize($v));
if(in_array($hash, $hashAry)) unset($array[$k]);
else $hashAry[]=$hash;
}
$array = array_values($array);
return $array;
}
Output:
before array_unique_multi:
Array
(
[0] => Array
(
[2] => 3
)
[1] => Array
(
[12] => 32
)
[2] => Array
(
[2] => 3
)
[3] => Array
(
[24] => 32
)
)
after array_unique_multi:
Array
(
[0] => Array
(
[2] => 3
)
[1] => Array
(
[12] => 32
)
[2] => Array
(
[24] => 32
)
)

Answer 3

You can use the function array_unique.
http://php.net/manual/fr/function.array-unique.php
foreach ($myMultiArray as $index => $doublonArray) {
$myMultiArray[$index] = array_unique($doublonArray);
}

Answer 4

Use this. This will store all the different key / value pairs in the new array.
$test = array(
array(2 => 3),
array(12 => 32),
array(2 => 3),
array(24 => 42)
);
$tmpArray = array();
$newArray = array();
foreach ($test as $elements) {
foreach ($elements as $key => $val) {
if (!array_key_exists($key, $tmpArray) || $tmpArray[$key] !== $val) {
$tmpArray[$key] = $val;
}
}
}
foreach ($tmpArray as $key => $val) {
$newArray[] = array($key => $val);
}
var_dump($newArray);
Output:
array
0 =>
array
2 => int 3
1 =>
array
12 => int 32
2 =>
array
24 => int 42

Answer 5

$check_arr = Array (
[0] => Array ( [13] => 1 )
[1] => Array ( [13] => 3 )
[2] => Array ( [13] => 1 )
[3] => Array ( [10] => 3 )
) ;
print_r(array_unique($check_arr));
This my result.
Array ( [0] => Array ( [13] => 1 ) );