session_start();

if ( !$_SESSION['key'] )

{

$alphabet = 'abcdefghiklmnopqastuvwxyz';

for ( $i = 0; $i < 10; $i++ )

{

if ( rand( 0, 1 ) == 0 )

{

$_SESSION['key'] .= rand( 1, 9 );

}

else

{

if ( rand( 0, 1 ) == 0 )

{

$_SESSION['key'] .= strtolower( $alphabet[rand

( 0, 24; )] );

}

else

{

$_SESSION['key'] .= strtoupper( $alphabet[rand

( 0, 24; )] );

}

}

}

}

if ( $_POST['text'] && $_POST['key'] )

{

if ( !$_POST['key'] OR $_POST['key'] !=

$_SESSION['key'] ) $errors[] = 'Ошибка

сессии!';

if ( !$_POST['text'] ) $errors[] = 'Ошибка,

введите текст сообщения!';

if ( $errors )

{

foreach ( $errors as $error )

{

echo $error . '<br/>';

}

}

else

{

}

}

else

{

echo '<form action='?' . session_name() .

'=' . session_id() . '' method='post'>

Сообщение:

<br/>

<input type='text' name='text'/>

<br/>

<input type='hidden' name='key' value='' .

$_SESSION['key'] . ''/>

<br/>

<input type='submit' value='Отправить'/>

</form>';

}