Question

I have a variable called $data which contains a giant string (27338 characters).

This string will be the content of a pdf file.

I need to add a footnote at the end of each page of the pdf file.

I’ve calculated 2642 characters per page.

How can I cut $data in chunks of 2642 characters so I can add the footnotes?

I’m trying:

$split = preg_split('/(.{0,2642})\s/',
                    $data,
                    0,
                    PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);

$count = count($split);
foreach ($split as $key => $page) {

    echo $page; echo "<br><br>";
}

But each $page shows much less than 2642 characters.

Thanks a lot

Answer 1

I never used it with very large amount of data but a way to split strings in elements of equal length is to use the str_split function (see http://php.net/str_split)

usage:

$array = str_split('some text', 2);

and you will get an array with elements of length 2 (except for the last one)