Select arrays with multiple occurence from a array of arrys - PHP - php

Question

My array is given below. Which contains more than one arrays.
Array
(
[0] => Array
(
[user_id] => 1
[name] => name1
)
[1] => Array
(
[user_id] => 2
[name] => name2
)
[2] => Array
(
[user_id] => 2
[name] => name2
)
[3] => Array
(
[user_id] => 3
[name] => name3
)
)<br/>
I need arrays which has more than one occurence.In this case
Array
(
[user_id] => 2
[name] => name2
)

Answer 1

Try this.
function get_multi_occur($my_array)
{
foreach ($my_array as $id => $a) {
$key = $a[user_id] . $a[name];
if ($s[$key]['cnt'] == 0) {
$s[$key]['cnt'] = 1;
$s[$key]['id'] = $id;
} else {
$s[$key]['cnt']++;
}
}
foreach ($s as $r) {
if ($r['cnt'] >= 2) {
$ret[] = $my_array[$r[id]];
}
}
return $ret;
}

Answer 2

foreach ($array as $key_1=>$sub_array_1)
{
foreach ($array as $key_2=>$sub_array_2)
{
if ($sub_array_1 == $sub_array_2 &&
$key_1 != $key_2)//prevent to compare same sub arrays
print_r($sub_array_1);
}
}
something like this

Answer 3

You can try
$array = Array(
"0" => Array("user_id" => 1,"name" => "name1"),
"1" => Array("user_id" => 2,"name" => "name2"),
"2" => Array("user_id" => 2,"name" => "name2"),
"3" => Array("user_id" => 3,"name" => "name3"));
$d = $s = array();
array_map(function ($v) use(&$d, &$s) {
array_key_exists($v['user_id'], $s) && ! array_key_exists($v['user_id'], $d) ? $d[$v['user_id']] = $v : $s[$v['user_id']] = $v;
}, $array);
var_dump($d);
Output
array
2 =>
array
'user_id' => int 2
'name' => string 'name2' (length=5)

Answer 4

Create a new array that will store data that have same values.
Try this code :
$array_existing = array();
$ctr = 0;
foreach ($first_array as $key => $first) :
foreach ($second_array as $keytwo => $second) :
if ($first['user_id'] == $second['user_id'] && $first['name'] == $second['name']) {
$array_existing[$ctr]['user_id'] = $first['user_id'];
$array_existing[$ctr]['name'] = $first['name'];
$array_existing[$ctr]['first_index'] = $key;
$array_existing[$ctr]['second_index'] = $keytwo;
$ctr++;
}
endforeach;
endforeach;
var_dump($array_existing);