From the variable input sum the integer values of it

sum_integers_from_coma_string.php

<?php
    $input = "1,2,3,4,5,6,7";
    
    $sum = 0;
    print($input);
    
    $input_arr = explode(",", $input);
    
    foreach($input_arr as &$inp)
    {
        $sum = $sum + $inp;
    }
    
    print($sum);