PHP 8 reference · String Functions

PHP str_split() Function

Split a string into an array of chunks of a given length, one byte each by default. Use mb_str_split() for UTF-8.

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Syntax

str_split(string $string, int $length = 1): array

Parameter	Description
`string`	The input string.
`length` optional	The size of each chunk in bytes. Default: `1`

An array of strings.

Characters and chunksTry it yourself

<?php
print_r(str_split("PHP"));
print_r(str_split("ABCDEFG", 3));

Output

Array
(
    [0] => P
    [1] => H
    [2] => P
)
Array
(
    [0] => ABC
    [1] => DEF
    [2] => G
)

Group digitsTry it yourself

<?php
echo implode(" ", str_split("4111222233334444", 4)), "\n";

Output

4111 2222 3333 4444

Version	Change
PHP 5.0	Added
PHP 8.2	An empty string returns an empty array instead of `[""]`.

mb_str_split() · Split a multibyte string into an array of characters, or of chunks of n characters. The UTF-8-safe str_split().
explode() · Split a string into an array by a separator, like turning "a,b,c" into ["a", "b", "c"]. A limit caps the pieces.
PHP Strings · tutorial