Remove duplicate element in an array | Learning Curve- Perfect Tutorial for the beginers

if array elements contain multiple values like below,how to remove duplicate element

array
(
    [0] => mydoubts.in+testone@gmail.com,mydoubts.in+onesec@gmail.com,mydoubts.in+testone@gmail.com
    [1] => mydoubts.in+testone@gmail.com,mydoubts.in+testonesec@gmail.com
)

array

(

[0] => mydoubts.in+testone@gmail.com,mydoubts.in+onesec@gmail.com,mydoubts.in+testone@gmail.com

[1] => mydoubts.in+testone@gmail.com,mydoubts.in+testonesec@gmail.com

)

we can use array_unique on an array created using explode function.Code will be looks like below

<?php
$to_list=array('mydoubts.in+testone@gmail.com,mydoubts.in+onesec@gmail.com,mydoubts.in+testone@gmail.com','mydoubts.in+testone@gmail.com,mydoubts.in+testonesec@gmail.com');
echo "<pre>";print_r($to_list);echo "<br>";
 for ($s = 0; $s < count($to_list); $s++) {
$to_list[$s] = implode(',', array_unique(explode(',', $to_list[$s])));
}
print_r($to_list);echo "<pre>";
?>

<?php

$to_list=array('mydoubts.in+testone@gmail.com,mydoubts.in+onesec@gmail.com,mydoubts.in+testone@gmail.com','mydoubts.in+testone@gmail.com,mydoubts.in+testonesec@gmail.com');

echo "<pre>";print_r($to_list);echo "<br>";

for ($s = 0; $s < count($to_list); $s++) {

$to_list[$s] = implode(',', array_unique(explode(',', $to_list[$s])));

}

print_r($to_list);echo "<pre>";

Vaishak Kallore

An alternate, better solution.


$arr = [
    0 => 'mydoubts.in+testone@gmail.com,mydoubts.in+onesec@gmail.com,mydoubts.in+testone@gmail.com',
    1 => 'mydoubts.in+testone@gmail.com,mydoubts.in+testonesec@gmail.com',
];

echo "Actual n";
print_r($arr);

$str_emails = implode(',', $arr);
$arr_unique = explode(',', $str_emails); // OR $arr_unique = explode(',', implode(',', $arr));
$arr_unique = array_unique($arr_unique);

echo "Unique n";
print_r($arr_unique);

$arr = [

0 => 'mydoubts.in+testone@gmail.com,mydoubts.in+onesec@gmail.com,mydoubts.in+testone@gmail.com',

1 => 'mydoubts.in+testone@gmail.com,mydoubts.in+testonesec@gmail.com',

];

echo "Actual n";

print_r($arr);

$str_emails = implode(',', $arr);

$arr_unique = explode(',', $str_emails); // OR $arr_unique = explode(',', implode(',', $arr));

$arr_unique = array_unique($arr_unique);

echo "Unique n";

print_r($arr_unique);

Vasanthan pv

Hi
In your solution output is getting as below
Array
(
[0] => mydoubts.in+testone@gmail.com
[1] => mydoubts.in+onesec@gmail.com
[4] => mydoubts.in+testonesec@gmail.com
)

i need the output as below

Array
(
[0] => mydoubts.in+testone@gmail.com,mydoubts.in+onesec@gmail.com
[1] => mydoubts.in+testone@gmail.com
)
- Vaishak Kallore
  
  Alright.
  
  Just by adding following line after array unique code, we will have the keys reset.
  
  $arr_unique = array_values($arr_unique);
  
  1
  2
  3
  
  $arr_unique = array_values($arr_unique);