PHP/Data Structure/array unique

array_unique( ) filters an array so that a value can only appear once.

 
<?
    $toppings2 = array("Peppers", "Ham", "Cheese", "Peppers");
    $toppings2 = array_unique($toppings2);
?>

To get the unique values in an array: array_unique() function

 
<?
$countries= array("Germany" => "German", "France" => "French", "Spain" => "Spanish"); 
$languages = array_unique($countries); 
printf("%s,", var_export($languages, TRUE)); 
?>

Working with Unique Values

 
<?php
  $countries = array( "USA" => "English", "Spain" => "Spanish",
                      "Brasil" => "Portuguese", "UK" => "English",
                      "France" => "French", "Argentina" => "Spanish");
  $languages = array_unique($countries);
  printf("<pre>%s</pre>\n", var_export($languages, TRUE));
  $languages = array_unique( array_values($countries) );
  printf("<pre>%s</pre>\n", var_export($languages, TRUE));
  $languages = array_values( array_unique($countries) );
  printf("<pre>%s</pre>\n", var_export($languages, TRUE));
?>