The chunk_split() function divides a string into a sequence of small fragments. chunk_split() adds the character(s) specified in chunk_ending every chunk_length characters. This function is useful for breaking certain types of data into separate lines of a specified length. It’s often used to make base64 encoded data conform to RFC 2045. This function was introduced in PHP3.
Syntax:
string chunk_split(string string, [int chunk_length], [string chunk_ending])
Parameters
| Parameter | Description |
|---|---|
| string | String to split into chunks |
| chunk_length | Length of the chunks (default 76) |
| chunk_ending | Character(s) to place at the end of each chunk (default \r\n) |
Return Values
String with chunk_ending placed every chunk_length
Examples
Example 1:
<?php // formatting $info by using the RFC 2045 semantics $new_strng = chunk_split(base64_encode($info)); ?>
Example 2:
$data = "...some long data..."; $converted = chunk_split(base64_encode($data));
Note: This function should not be used for breaking long lines of text into shorter lines for display purposes—use wordwrap() instead.