remove duplicate value in array php code example

Example 1: php remove duplicates from array

<?php
$fruits_list = array('Orange',  'Apple', ' Banana', 'Cherry', ' Banana');
$result = array_unique($fruits_list);
print_r($result);
?>
  
Output:

Array ( [0] => Orange [1] => Apple [2] => Banana [3] => Cherry )

Example 2: how to remove duplicate values from an array in php

<?php
$input = array("a" => "green", "red", "b" => "green", "blue", "red");
$result = array_unique($input);
print_r($result);
?>

Array
(
    [a] => green
    [0] => red
    [1] => blue
)

Example 3: how to remove duplicate values from a multidimensional array in php

We used this to de-duplicate results from a variety of overlapping queries.

$input = array_map("unserialize", array_unique(array_map("serialize", $input)));

Example 4: filter duplicate associative array by value check in php

<?php
function unique_key($array,$keyname){

 $new_array = array();
 foreach($array as $key=>$value){

   if(!isset($new_array[$value[$keyname]])){
     $new_array[$value[$keyname]] = $value;
   }

 }
 $new_array = array_values($new_array);
 return $new_array;
}

// Array
$student_arr[] = array("name" => "Yogesh Singh","age"=>24);
$student_arr[] = array("name" => "Sonarika Bhadoria","age"=>24);
$student_arr[] = array("name" => "Anil Singh","age" => 23);
$student_arr[] = array("name" => "Mayank Patidar","age" => 25);
$student_arr[] = array("name" => "Anil Singh","age" => 19);

// Remove duplicate value according to 'name'
$student_unique_arr = unique_key($student_arr,'name');

echo "<pre>";
print_r($student_arr);
echo "</pre>";

echo "<b>Array after remove duplicate key</b>";
echo "<pre>";
print_r($student_unique_arr);
echo "</pre>";