<?
session_start();
if(isset($_POST['delete'])){unset($_SESSION['rezult']);}
if(isset($_SESSION['rezult'])){
$q = $_SESSION['rezult'] - 5;
$_SESSION['rezult'] = $q ;
}
else{
$arr = file("50.txt");
if($arr) foreach($arr as $line){
$q = $arr[0] - 5;
$_SESSION['rezult'] = $q;
}
}
echo $q;
?>
<form action="index.php" method="post" name="form">
<input type="submit" name="sub" value="Вычеслить">
<input type="submit" name="delete" value="Сброс">
</form>
Вариант 2.Когда в результате 0 сбрасывает
<?
session_start();
if($_SESSION['rezult'] < 1){unset($_SESSION['rezult']);}
if(isset($_SESSION['rezult'])){
$q = $_SESSION['rezult'] - 5;
$_SESSION['rezult'] = $q ;
}
else{
$arr = file("50.txt");
if($arr) foreach($arr as $line){
$q = $arr[0] - 5;
$_SESSION['rezult'] = $q;
}
}
echo $q;
?>
<form action="index.php" method="post" name="form">
<input type="submit" name="sub" value="Вычеслить">
</form>
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