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PHP Array array_fill() Function (With Examples)

In this tutorial, we will learn about the PHP array_fill() function with its usage, syntax, parameters, return value, and examples. By IncludeHelp Last updated : December 31, 2023

PHP array_fill() Function

The array_fill() function is used to fill the n elements in an array from given index with the specific value.

Syntax

The syntax of the array_fill() function:

array_fill(index, n, value) : array

Parameters

The parameters of the array_fill() function:

index is the starting position from where we have to start filling the elements.
n is the total number of elements to be filled from given “index”.
value is any string, integer etc value to be filled.

Return Value

The return type of this method is array, it returns the filled array.

Sample Input/Output

Input:
index = 3
n = 5
value = "Okay"

Output:
Array
(
    [3] => Okay
    [4] => Okay
    [5] => Okay
    [6] => Okay
    [7] => Okay
)

PHP array_fill() Function Example

<?php
//filling from 3rd index 
$arr1 = array_fill(3, 5, "Okay");	
print_r ($arr1); 

//filling from 0th index to next 5
//i.e. from index 0 to 4
$arr2 = array_fill(0, 5, "Hello");
print_r ($arr2); 
?>

Output

The output of the above example is:

Array
(
    [3] => Okay
    [4] => Okay
    [5] => Okay
    [6] => Okay
    [7] => Okay
)
Array
(
    [0] => Hello
    [1] => Hello
    [2] => Hello
    [3] => Hello
    [4] => Hello
)

To understand the above example, you should have the basic knowledge of the following PHP topics:

PHP array_diff() Function

PHP array_fill_keys() Function