PHP array_slice() Function

In this chapter you will learn:

Definition for PHP array_slice() Function
Syntax for PHP array_slice() Function
Parameter for PHP array_slice() Function
Example - slice from 2
Example - Start the slice from from the second array element, and return only two elements
Example - Using a negative start parameter
Example - With the preserve parameter set to true
Example - With both string and integer keys

Definition

The array_slice() function returns selected parts of an array.

Syntax

PHP array_slice() Function has the following syntax.

array_slice(array,start,length,preserve)

Parameter

Parameter	Is Required	Description
array	Required.	Array to slice
start	Required.	Starting point. 0 = the first element. negative value mean to slice from last element. -2 means start at the second last element of the array.
length	Optional.	length of the returned array. negative number means stop slicing that far from the last element. If not set, the function will return all elements, starting from start.
preserve	Optional.	preserve or reset the keys.

Possible values for preserve:

true - Preserve keys
false - Default. Reset keys

Example 1


<?php
    $a=array("A","B","C","D","java2s.com");
    print_r(array_slice($a,2));
?>

The code above generates the following result.

Example 2

Start the slice from from the second array element, and return only two elements:


<?php
    $a=array("A","B","C","D","java2s.com");
    print_r(array_slice($a,1,2));
?>

The code above generates the following result.

Example 3

Using a negative start parameter:


<?php
    $a=array("A","B","C","D","java2s.com");
    print_r(array_slice($a,-2,1));
?>

The code above generates the following result.

Example 4

With the preserve parameter set to true:


<?php
    $a=array("A","B","C","D","java2s.com");
    print_r(array_slice($a,1,2,true));
?>

The code above generates the following result.

Example 5

With both string and integer keys:


<?php//j  av  a  2s  .  com
    $a=array("a"=>"Java","b"=>"PHP","c"=>"java2s.com","d"=>"HTML","e"=>"java2s.com");
    print_r(array_slice($a,1,2));
    
    $a=array("0"=>"A","1"=>"B","2"=>"C","3"=>"D","4"=>"java2s.com");
    print_r(array_slice($a,1,2));
?>