<?php

// Putting values from input into variable
$numbers = $_GET['numbers'];
// Creating empty array
$choosenNumbers = [];
// Creating array values from text input
$choosenNumbers = explode(",", $numbers);

/*
* Function sorting choosen array
* Params $array
*/
function bubbleSort($array) {
    for ($i = 0; $i < count($array); $i++){
        //Checking if any index of array is string
        if (!is_string($array[$i])){
            // Creating loop
            for ($j = 0; $j < count($array); $j++) {
                // Creating loop that's sorting array $array
                for ($k = 0; $k < count($array) - 1; $k++) {
                    // Checking if index $j is bigger than index $j + 1
                    if ($array[$k] > $array[$k+1]) {
                        // Swapping array pieces
                        $temp = $array[$k];
                        $array[$k] = $array[$k+1];
                        $array[$k+1] = $temp;
                    }
                }
            }
            //print_r($array);
            for ($index = 0; $index < count($array); $index++) {
                echo "<b>$array[$index]</b>";
                echo "<br />";
            }
        } else {
            echo "Pole tekstowe nie może zawierać żadnej litery!";
            break;
        }
    }
}

// Calling function
bubbleSort($choosenNumbers);
echo "<br /><a href='index.php'>Powrót</a>";

?>