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grapheme_str_split

(PHP 8 >= 8.4.0)

grapheme_str_split — Split a string into an array

Description

function grapheme_str_split(string $string, int $length = 1): array|false

This function will return an array of strings, it is a version of str_split() with support for grapheme cluster byte characters. If the length parameter is specified, the string is broken down into chunks of the specified length in grapheme clusters (not bytes).

Parameters

string: The string to split into grapheme clusters or chunks. string must be valid UTF-8.
length: Each element of the returned array will be composed of length grapheme clusters.

Return Values

grapheme_str_split() returns an array of strings, or false on failure.

Errors/Exceptions

If length is less than 1, a ValueError will be thrown.

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User Contributed Notes 1 note

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cygx1 at blackhole dot io ¶

1 year ago

Here is a userland implementation that can be included in code that needs to support PHP 8.3 and below:

<?php

if (!function_exists('grapheme_str_split')) {
    function grapheme_str_split(string $string, int $length = 1): array|false
    {
        if ($length < 1) {
            throw new \ValueError('Argument #2 ($length) must be greater than 0 and less than or equal to 1073741823');
        }

        try {
            return preg_split('/(\X{' . $length . '})/u', $string, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
        } catch (\Throwable $e) {
            return false;
        }
    }
}

?>