Remove Duplicate array elements and sort their indexes

In this post will learn how to remove the duplicate  element from an array using PHP

1- This is our unidimensional array:

   
    $DayofWeek = array('lunes','martes','lunes','miercoles','miercoles','jueves','martes','viernes','miercoles');
 

Output:

 Array

(
    [0] => lunes
    [1] => martes
    [2] => lunes
    [3] => miercoles
    [4] => miercoles
    [5] => jueves
    [6] => martes
    [7] => viernes
    [8] => miercoles
)

As you can see we have a duplicate elements to remove the duplicity we can use the php function called array_unique() as follows:

   
    $newArray = array_unique($DayofWeek);
 

Remember  array_unique function will create a new array.

This is the output:

Array
(
    [0] => lunes
    [1] => martes
    [3] => miercoles
    [5] => jueves
    [7] => viernes
)

If you have noticed the array is untidy  if you want to sort by the indix , there is a php a php function called sort :

   
   sort($newArray);
 

This is the output

Array
(
    [0] => jueves
    [1] => lunes
    [2] => martes
    [3] => miercoles
    [4] => viernes
)