PHP chunk_split() Function

The PHP chunk_split() function splits a string into smaller chunks. It inserts separator every length characters.

Syntax

chunk_split(string, length, separator)

Parameters

Return Value

Returns the chunked string.

Example:

The example below shows the usage of chunk_split() function.

<?php
$str = "Hello World";

echo chunk_split($str, 6, "... \n");
?>

The output of the above code will be:

Hello ... 
World...    

Example:

Consider one more example where this function is used with base64_encode function. The smaller chunks produced by this function is useful for e.g. converting base64_encode() output to match with RFC 2045 semantics.

<?php
$str = "He is John. He likes to code. He lives in London.";

echo chunk_split(base64_encode($str), 20);
?>

The output of the above code will be:

SGUgaXMgSm9obi4gSGUg
bGlrZXMgdG8gY29kZS4g
SGUgbGl2ZXMgaW4gTG9u
ZG9uLg==