PHP: array_pad() function

Last update on August 19 2022 21:51:15 (UTC/GMT +8 hours)

PHP: Pad array to the specified length with a value

The array_pad() function is used to padding (insert) a specified number of elements, with a specified value, into an array.
If the specified value is positive then the array is padded on the right, if it is negative then padded on the left.
If the specified value is less than or equal to the length of the input then no padding takes place.

Version

(PHP 4 and above)

Syntax

array array_pad (input_array, pad_size, pad_value)

Parameters

Name	Description	Required / Optional	Type
input_array	Specifies the name of the array.	Required	Array
pad_size	A total number of elements in the resulting array after padding.	Required	Array
pad_value	Value with which padding will take place, must be less than the size of the input_array.	Required	Mixed*

*Mixed : Mixed indicates that a parameter may accept multiple (but not necessarily all) types.

Return value

An array with new elements.

Value Type : Array

Example:

<?php
$input_array= array(1,7,10,6);
$result=array_pad($input_array,5,330);
print_r($result);
?>

Output:

Array ( [0] => 1 [1] => 7 [2] => 10 [3] => 6 [4] => 330  )

Pictorial Presentation:

php function reference: array_pad() function

View the example in the browser

Practice here online :

PHP: Tips of the Day

Filters the collection using the given callback

Example:

<?php
function tips_reject($items, $func)
{
  return array_values(array_diff($items, array_filter($items, $func)));
}

print_r(tips_reject(['Apple', 'Pear', 'Kiwi', 'Banana'], function ($item) {
  return strlen($item) > 4;
}));
?>

Output:

Array
(
    [0] => Pear
    [1] => Kiwi
)