$your_array = explode("\n", $your_string_from_db);

For instance, if you have this piece of code :

$str = "My text1\nMy text2\nMy text3";
$arr = explode("\n", $str);
var_dump($arr);

You’d get this output :

array
  0 => string 'My text1' (length=8)
  1 => string 'My text2' (length=8)
  2 => string 'My text3' (length=8)

Note that you have to use a double-quoted string, so \n is actually interpreted as a line-break.
(see that manual page for more details)

หรือ

A line break is defined differently on different platforms, \r\n, \r or \n.

Using RegExp to split the string you can match all three with \R

So for your problem:

$array = preg_split ('/$\R?^/m', $string);

That would match line breaks on Windows, Mac and Linux!

หรือ

I’ve always used this with great success:

$array = preg_split("/\r\n|\n|\r/", $string);

(updated with the final \r, thanks @LobsterMan)

อ่านเพิ่ม

https://stackoverflow.com/questions/1483497/how-to-put-string-in-array-split-by-new-line

https://stackoverflow.com/questions/23955393/php-divide-string-by-new-line-n-character

<?php
    $my_array = array("stuff1", "stuff2", "stuff3");
    foreach ( $my_array as $item ) {
        echo $item . "<br/>";
    }
?>