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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>
- <!--Write your PHP Script here-->
- }<?php
- if(isset($_GET['num'])) {
- $num = intval($_GET['num']);
- for($i= $num; $i>=3; $i--) {
- $isPrime = true;
- for($j = 2; $j <= sqrt($i); $j++) {
- if($i % $j == 0) {
- $isPrime = false;
- }
- }
- if($isPrime) {
- echo $i . " ";
- }
- }
- echo ' ', 2;
- }
- ?>
- </body>
- </html>
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