在每个第n个元素php之后拆分一个字符串

Question

I have a string in this form

$navigation="<li>A</li><li>B</li><li>C</li><li>A</li><li>B</li><li>C</li><li>A</li><li>B</li><li>C</li>";

The list is generated dynamically from database and hence the number of elements is not fixed. I want to split this list after every 5th element, so if there are 10 "<li></li>" elements in this string I should get two strings output1 and output2.

I have tried explode but it doesn't work as we have to impose restriction on nth element and I have also tried string_split but that is not working also.

So what is the solution?

Ahmar

Answer 1

You can do it this way:

$s = "<li>A</li><li>B</li><li>C</li><li>A</li><li>B</li><li>C</li><li>A</li><li>B</li><li>C</li>";
if (preg_match_all('~((?:<li>.*?</li>){5})~i', $s, $arr))
   print_r($arr);

OUTPUT:

Array
(
    [0] => Array
        (
            [0] => <li>A</li><li>B</li><li>C</li><li>A</li><li>B</li>
        )

    [1] => Array
        (
            [0] => <li>A</li><li>B</li><li>C</li><li>A</li><li>B</li>
        )

)