PHP chunk_split() Function

The chunk_split() function is a built-in function in PHP. The chunk_split() function is used to split a string into smaller chunks of a specific length.

Syntax: 

string chunk_split($string, $length, $end)

Parameters: This function accepts three parameters as shown in the above syntax and are described below: 

1. $string: This parameter specifies a string which is needed to be chunked.
2. $length: This parameter specifies an integer which specifies the chunk length. That is the length of the chunked parts.
3. $end: This parameter specifies the line ending sequence.

Return value: This function returns the string splitted into smaller chunks.

Examples: 

Input : string = "geeksforgeeks" 
        length = 4
        end = "."
Output: Geek.sfor.Geek.s. 


Input: string = "Twinkle bajaj" 
       length = 2 
       end = "*" 
Output: Tw*in*kl*e *ba*ja*j* 

Below programs illustrate the chunk_split() function in PHP:

Program 1:  

<?php
// PHP program to illustrate the  
// chunk_split function 

$str = "Twinkle bajaj";
echo chunk_split($str, 2, "*");

?> 

Output: 

Tw*in*kl*e *ba*ja*j* 

Program 2: 

<?php
// PHP program to illustrate the  
// chunk_split function 

$str = "geeksforgeeks";

// Returns a string with a '.'
// placed after every four characters.
echo chunk_split($str, 4, ".");
?> 

Output: 

geek.sfor.geek.s. 

Program 3: 

<?php
// PHP program to illustrate the  
// chunk_split function 

$str = "abcd";
echo chunk_split($str, 4, "@@");
?> 

Output: 

abcd@@

Program 4: 

<?php
// PHP program to illustrate the  
// chunk_split function 

// If specified length is more than
// string length, then added at the
// end.
$str = "abcd";
echo chunk_split($str, 10, "@@");
?> 

Output: 

abcd@@

Reference: 
http://php.net/manual/en/function.chunk-split.php