You can simply do it using in_array()

$data = Array(
    0 => Array("a", "b", "c"),
    1 => Array("x", "y", "z"),
    2 => Array("a", "b", "c"),
    3 => Array("a", "b", "c"),
    4 => Array("a", "x", "z"),
);

$final = array();
foreach ($data as $array) {
    if(!in_array($array, $final)){
        $final[] = $array;
    }
}

which will get you something like

array(3) {
  [0] => array(3) {
    [0] => string(1) "a"
    [1] => string(1) "b"
    [2] => string(1) "c"
  }
  [1] => array(3) {
    [0] => string(1) "x"
    [1] => string(1) "y"
    [2] => string(1) "z"
  }
  [2] => array(3) {
    [0] => string(1) "a"
    [1] => string(1) "x"
    [2] => string(1) "z"
  }
}

foreach ( $result1 as $key ):
    $o[implode(', ', $key)][] = null;
     foreach ($o as $key1) {
        $g[implode(', ', $key)] = count($key1);
    }
endforeach;
print_r($g);

I make this way:

<?php

$log = array (
  array('Red', 'Steel'),
  array('Red', 'Wood'),
  array('Blue', 'Wood')
);

$materials = array();
$colors = array();

foreach(line) {
  $colors[$line[0]] = (!isset($colors[$line[0]])) ? 1 : $colors[$line[0]] + 1;
  $materials[$line[1]] = (!isset($materials[$line[1]])) ? 1 : $materials[$line[1]] + 1;
}

?>

<h2>Colors</h2>\n
<?php
foreach ($colors as $color => $amount)
  echo "{$color} => {$amount}<br>\n";
?>
<h2>Materials</h2>\n
<?php
foreach ($materials as $material => $amount)
  echo "{$material} => {$amount}<br>\n";
?>

foreach ($array as $value) 
{
    $numbers[$value[lid]]++;
}
foreach ($numbers as $key => $value) 
{
    echo 'numbers of '.$key.' equal '.$value.'<br/>';
}

if you want to try without 'array_count_values' you can do with a smart way here

<?php
$input= array(12,43,66,21,56,43,43,78,78,100,43,43,43,21);

$count_values = array();
foreach ($input as $a) {

     @$count_values[$a]++;

}
echo 'Duplicates count: '.count($count_values);
print_r($count_values);
?>

Try below code:

<?php
$array = array(array("link" => "http://myexample.com", "total" => 3), array("link" => "http://myexampledomain.com", "total" => 2), array("link" => "http://myexample.com", "total" => 1));
$res = array();
foreach ($array as $vals) {
    if (array_key_exists($vals['link'], $res)) {
        $res[$vals['link']]+=$vals['total'];
    } else {
        $res[$vals['link']]=$vals['total'];
    }
}
print_r($res);
?>

This one should work for you:

foreach($array as $key => $value) {
    foreach ($array as $k => $v) {
        if ($key < $k && $value['email'] == $v['email']) {
            $result[] = array(
                $value,
                $v
            );
        }
    }
}

PHPFiddle Link: http://phpfiddle.org/main/code/8trq-k2zc

Please note: this would only find you the conflicting pairs. For example:

$array = array(
    array(
        'email' => '[email protected]',
        'name' => 'abc'
    ),
    array(
        'email' => '[email protected]',
        'name' => 'def'
    ),
    array(
        'email' => '[email protected]',
        'name' => 'ghi'
    )
);

Would result in:

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [email] => [email protected]
                    [name] => abc
                )

            [1] => Array
                (
                    [email] => [email protected]
                    [name] => def
                )

        )

    [1] => Array
        (
            [0] => Array
                (
                    [email] => [email protected]
                    [name] => abc
                )

            [1] => Array
                (
                    [email] => [email protected]
                    [name] => ghi
                )

        )

    [2] => Array
        (
            [0] => Array
                (
                    [email] => [email protected]
                    [name] => def
                )

            [1] => Array
                (
                    [email] => [email protected]
                    [name] => ghi
                )

        )

)

So abc conflicts with def, abc conflicts with ghi, and def conflicts with ghi.

In this sample I've used array_reduce to build a second array out of appropriate elements from your first array. Due to the way that I check for duplicate values, this assumes that your initial array is sorted (all the dupes are next to each other).

function dedupe($carry, $item) {
    // check if array is non empty, and the last item matches this item
    if (count($carry) > 0 
        && $carry[count($carry) - 1][0] == $item[0] 
        && $carry[count($carry) - 1][1] == $item[1]) {

        // the array contains a match, increment counter
        $carry[count($carry) - 1][2]++;
    } else {
        // there was no match, add element to array
        $carry[] = array($item[0], $item[1], 1);
    }
    return $carry;
}

$cars = array(
    array(1, "BMW"),
    array(1, "BMW"),
    array(2, "Mercedes")
);

$uniques = array_reduce($cars, "dedupe", array());

var_dump($uniques);

As of php 5.5 (because of array_column*) you can use

<?php
$num = array (
    array ( 'Num' => 2 ), array ( 'Num' => 3 ), array ( 'Num' => 13 ), array ( 'Num' => 2 ),
    array ( 'Num' => 3 ),   array ( 'Num' => 3 ),   array ( 'Num' => 1 ), array ( 'Num' => 44 ) 
);

$x = array_filter(
    array_count_values(
        array_column($num, 'Num')
    ),
    function($e) { return $e>1; }
);
var_export($x);

i.e.
- get all the elements 'Num' in $num as a "flat, 1-d" array.
- count the occurence of each value
- only keep count()>1 in the array

-- * in the user contributes notes for array_column there are fill-ins for php <5.5
And since you only have one element per array in $num you could also use array_map/array_shift

edit: a more verbose version without array_column

<?php
$num = array (
    array ( 'Num' => 2 ), array ( 'Num' => 3 ), array ( 'Num' => 13 ), array ( 'Num' => 2 ),
    array ( 'Num' => 3 ),   array ( 'Num' => 3 ),   array ( 'Num' => 1 ), array ( 'Num' => 44 ) 
);
// first remove the superfluous second dimension
$num = array_map(function($e) { return $e['Num']; }, $num); // -> $num = [ 2,3,13,2,3,3,1,44]
$num = array_count_values($num); // -> $num = [2=>2, 3=>3, 13=>1, 1=>1, 44=>1]
$num = array_filter($num, function($e) { return $e>1; }); // -> $num = [2=>2, 3=>3]

printf('There are %d duplicate values. A total of %d elements are doublets',
    count($num), array_sum($num)
);

prints There are 2 duplicate values. A total of 5 elements are doublets