Make array unique in multidimensional array php codeigniter - php

Question

I have this array
Array (
[0] => Array
(
[0] => stdClass Object
(
[id] => 226
[user_id] => 1
[name] => Eden Corner Tub by Glass - $2099
)
[1] => stdClass Object
(
[id] => 225
[user_id] => 1
[name] => Blue Quilted Leather Jacket by Minusey - $499
)
[2] => stdClass Object
(
[id] => 222
[user_id] => 1
[name] => Darling New Bathtub by Duravit - $6300
)
)
[1] => Array
(
[0] => stdClass Object
(
[id] => 226
[user_id] => 1
[name] => Eden Corner Tub by Glass - $2099
)
[1] => stdClass Object
(
[id] => 229
[user_id] => 1
[name] => Batman Tumbler Golf Cart - $50000
)
[2] => stdClass Object
(
[id] => 228
[user_id] => 1
[name] => Swirlio Frozen Fruit Dessert Maker - $60
)
) )
I have an array of products that I need to make sure are unique.
Need to make this array unique by id. These array are generated by pushing value.
I'm trying to solve this for more than a week now, but I dont get it to work. I know it should be easy...but anyway - I don't get it :D

Answer 1

Try this:
$array = array(
0 => array(
"name" => "test",
"id" => 4
),
1 => array(
"name" => "test2",
"id" => 152
),
2 => array(
"name" => "test2",
"id" => 152
)
);
$newArray = array();
foreach($array as $value) {
$newArray[$value['id']]['name'] = $value['name'];
$newArray[$value['id']]['id'] = $value['id'];
}

Answer 2

foreach($array as $key=>$inner_array)
{
foreach($array as $key_again=>$array_again)
{
if($key != $key_again)
{
if($inner_array['name'] != $array_again['name'] AND $inner_array['id'] != $array_again['id'])
{
//its okay
}
else
{
unset($array[$key]);
}
}
}
}

Answer 3

Not sure how the arrays are generated, but, if you can change that, you could set the array keys to the IDs directly and check if the id is already set.
Otherwise, you can do the following:
$unique = array();
foreach( $array as $values ) {
if( ! isset( $unique[$values['id']] ) ) {
$unique[$values['id']] = $values;
}
}

Answer 4

This will make your array unique:
$array = array(
0 => array(
"name" => "test",
"id" => 4
),
1 => array(
"name" => "test2",
"id" => 152
),
2 => array(
"name" => "test2",
"id" => 152
) );
$result = array();
$index = array();
foreach($array as $i => $elem) {
if(!isset($index[$elem['id']])) {
$result[$i] = $elem;
$index[$elem['id']] = 1;
}
}
echo var_export($result);
Output:
array (
0 =>
array (
'name' => 'test',
'id' => 4,
),
1 =>
array (
'name' => 'test2',
'id' => 152,
),
)

Answer 5

This will work. It could be considered more clean than a for loop, but I'm not sure about performance.
$array = [
[ "name" => "test", "id" => 4 ],
[ "name" => "test2", "id" => 152 ],
[ "name" => "test2", "id" => 152 ]
];
array_walk($array, function(&$item, $idx) use($array){
$matches = array_slice(array_keys($array, $item), 1);
if (in_array($idx, $matches)) {
$item = false;
}
});
$array = array_filter($array);
Edit Since you updated the data set to work with, you would need to flatten it 1 level:
$array = call_user_func_array('array_merge', $array);