(PHP 4, PHP 5, PHP 7, PHP 8)
chunk_split — Split a string into smaller chunks
Can be used to split a string into smaller chunks which is useful for
e.g. converting base64_encode() output to match RFC
2045 semantics. It inserts separator every
length characters.
stringThe string to be chunked.
lengthThe chunk length.
separatorThe line ending sequence.
Returns the chunked string.
Example #1 chunk_split() example
<?php
$data = 'This is quite a long string, which will get broken up because the line is going to be too long after base64 encoding it.';
// format $data using RFC 2045 semantics
$new_string = chunk_split(base64_encode($data));
echo $new_string, PHP_EOL;
?>