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- <!doctype html>
- <html>
- <head>
- <title>Matrix of Numbers</title>
- <meta charset="UTF-8"/>
- </head>
- <body>
- <h3>Въведете число от 1 до 20</h3>
- <form action="<?php echo $_SERVER['PHP_SELF'];?>" method="get">
- Номер:<input type="text" name="n" size="10">
- <input type="submit" name="send" value="OK"><br/>
- <form>
- <?php
- if(isset($_GET['send'])){
- $n= $_GET['n'];
- //is_numeric($n) - проверява дали $n е число
- //ctype_digit($n) - проверява дали $n е цяло число
- if($n>=1 && $n<=20 && ctype_digit($n)){
- for($row=1; $row<=$n; $row++){
- echo $row;
- for($i=$row+1; $i<=$row+$n-1; $i++){
- echo " ".$i;
- }
- echo "<br/>";
- }
- }
- else{
- echo "Въведете цяло число,което е в интервала [1,20]";
- }
- }
- ?>
- </body>
- </html>
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