PHP - Split String Into Arrays for every N characters - php

Question

Is it possible to take a very long string and split it by sentence into 5000 char (or smaller) array items?
Here's what I have so far:
<?php
$text = 'VERY LONG STRING';
foreach(explode('. ', $text) as $chunk) {
$accepted[] = $chunk;
}
?>
This just splits the string into an array containing single sentence items. I need to group items into sub arrays, each containing a list of items which, when added together, contain no more than 5000 characters.
I tried this:
<?php
$text = 'VERY LONG STRING';
foreach(explode('. ', $text) as $chunk) {
$key = strlen(implode('. ', $accepted).'. '.$chunk) / 5000;
$accepted[$key][] = $chunk;
}
?>
You can probably see what I tried to do here, but it didn't work.
UPDATE:
This did the trick:
<?php
foreach(explode('. ', $text) as $chunk) {
$chunkLen = strlen(implode('. ', $result).'. '.$chunk.'.');
if ($len + $chunkLen > 5000) {
$result[] = $partial;
$partial = [];
$len = 0;
}
$len += $chunkLen;
$partial[] = $chunk;
}
if($partial) $result[] = $partial;
?>
Thank you to everyone who responded, your support means a lot.

Answer 1

You could do something like this:
$text = 'VERY LONG STRING';
$result = [];
$partial = [];
$len = 0;
foreach(explode(' ', $text) as $chunk) {
$chunkLen = strlen($chunk);
if ($len + $chunkLen > 5000) {
$result[] = $partial;
$partial = [];
$len = 0;
}
$len += $chunkLen;
$partial[] = $chunk;
}
if ($partial) {
$result[] = $partial;
}
You can test it more easily if you do it with a lower max length

Answer 2

If I don't misunderstand your question then you need something like this,
<?php
$text = 'VERY LONG STRING';
$s = chunk_split($text, 3, '|'); // put 5000 instead of 3
$s = substr($s, 0, -1);
$accepted = explode('|', $s);
print_r($accepted);
?>
OR
<?php
$text = 'VERY LONG STRING';
$accepted = str_split($text, 3);
print_r($accepted);
?>
DEMO: https://3v4l.org/H9DAl
DEMO: https://3v4l.org/PN7Aj