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- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <title>First Steps Into PHP</title>
- </head>
- <body>
- <form>
- N: <input type="text" name="num" />
- <input type="submit" />
- </form>
- <?php
- function primes (int $num) : array{
- $primenumbers = array();
- while ($num >= 2){
- $isPrime = true;
- for ($i = 2; $i < $num; $i++){
- if ($num % $i == 0){
- $isPrime = false;
- }
- }
- if ($isPrime == true){
- $primenumbers[] = $num;
- }
- $num--;
- }
- return $primenumbers;
- }
- if (isset($_GET['num'])){
- $num = intval($_GET['num']);
- echo implode(" ", primes($num));
- }
- ?>
- </body>
- </html>
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