PHP making array with multiple values from a string

I have a string that have a specific format. The format is, text:number,text:number... Lenght of this string is variable. Something like this:

$input = "hello:20,test:40,abc:25"

As I said, the lenght, text and numbers are variable and passed from another page.

I want to make this string into an array which should look like this.

$array[]  => {$array["title"],$array["length"]}
$array[0] => {"hello","20"}
$array[1] => {"test","40"}
$array[2] => {"abc","25"}

And I want to echo the array items with for loop. So,

<?php for($i=0;$i<count($array);$i++) { ?>
   <th><?=$array[$i]["length"]?></th>
   <th><?=$array[$i]["title"]?></th>
<?php } ?>

should result with

I have tried to use explode() function, but I could only seperate the string into array by the "," and couldn't figure out how to do it.

source https://stackoverflow.com/questions/67852942/php-making-array-with-multiple-values-from-a-string