如何在不使用explode函数的情况下将字符串转换为php中的数组

Question

I want to convert strings to array without using explode function in php I want output something like this ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 ) but without using explode().

    <?php

     $str="this is string"; 

    ?>

should be like this arr[0]=this arr[1]=is arr[2]=string

Answer 1

$j = mb_strlen($theString);
for ($k = 0; $k < $j; $k++) 
{
    $char = mb_substr($theString, $k, 1);
    $var_arr[$k] =  $char;
}

The above code don't use any pattern to split the string.

It ttakes one character at a time

EDIT suppose you have string

$s = 12.3.4.09.20

it will give the array as

array = ('1','2','.','3','.','4','.','0','9','.','2','0');

EDIT : COMPLETE CODE

<?php
$theString = "1.2.34.87";
$var_arr = array();
$j = mb_strlen($theString);
for ($k = 0; $k < $j; $k++) 
{
    $char = mb_substr($theString, $k, 1);
    $var_arr[$k] =  $char;
}
print_r($var_arr);
?>

go to http://phpfiddle.org/ and test over there

check the images as a proof