Removing Array Element and Re-Indexing in PHP

In order to remove an element from an array, we can use unset() function which removes the element from an array and then use array_values() function which indexes the array numerically automatically.

Function Used:

1. unset(): This function unsets a given variable.
   Syntax:

   void unset ( mixed $var [, mixed $... ] )

2. array_values(): This function returns all the values from the array and indexes the array numerically.
   Syntax:

   array array_values ( array $array )

Example 1:

<?php
$arr1 = array(

    'geeks', // [0]
    'for', // [1]
    'geeks' // [2]

);

// remove item at index 1 which is 'for'
unset($arr1[1]);

// Print modified array
var_dump($arr1);

// Re-index the array elements
$arr2 = array_values($arr1);

// Print re-indexed array
var_dump($arr2);
?>

Output:

array(2) {
  [0]=>
  string(5) "geeks"
  [2]=>
  string(5) "geeks"
}
array(2) {
  [0]=>
  string(5) "geeks"
  [2]=>
  string(5) "geeks"
}

We can also use array_splice() function which removes a portion of the array and replaces it with something else.
Example 2:

<?php
$arr1 = array(
    'geeks', // [0]
    'for', // [1]
    'geeks' // [2]
);

// remove item at index 1 which is 'for'
array_splice($arr1, 1, 1);

// Print modified array
var_dump($arr1);
?>

Output:

array(2) {
  [0]=>
  string(5) "geeks"
  [1]=>
  string(5) "geeks"
}

PHP is a server-side scripting language designed specifically for web development. You can learn PHP from the ground up by following this PHP Tutorial and PHP Examples.