每次按下按钮（PHP）时增加一个变量

Question

我希望每次按下提交按钮时，变量$order都会增加1。

（页面的名称是study.php所以按下按钮的页面被刷新每次）：

<?php 
$order = $_GET['number']; 

echo "<form action='study.php' method='GET'> 
    <input type='hidden' name='number' value='$order++' /> 
    <input class='big_b' type='submit' value='next' /> 
</form>"; 

echo "$order"; 
?> 

第一次1推按钮$顺序是1，第二个2，第三个是3 ...等

感谢您的帮助！

编辑：解决

<?php 
session_start(); 
if(empty($_SESSION['count'])) $_SESSION['count'] = 0; 
$order = $_SESSION['count']+1; 
$_SESSION['count'] = $order; 

echo "<form action='study.php' method='GET'> 
     <input class='big_b' type='submit' value='next' /> 
    </form>"; 

echo "$order"; 
?> 

Answer 1

<?php 
session_start(); 
if(empty($_SESSION['order'])){ 

    $_SESSION['order'] = 1; 
} 


echo "<form action='study.php' method='GET'> 
    <input type='hidden' name='number' value='".$_SESSION['order']++."' /> 
    <input class='big_b' type='submit' value='next' /> 
</form>"; 

echo $_SESSION['order']; 

?> 

Answer 2

你需要把$order++外引号，使（递增1）的操作。下面的代码：

<?php 
$order = $_GET['number']; 

echo "<form action='study.php' method='GET'> 
    <input type='hidden' name='number' value='".$order++."' /> 
    <input class='big_b' type='submit' value='next' /> 
</form>"; 

echo "$order"; 
?> 

Answer 3

如何你现在拥有它，就是它会增加每个页面的刷新按钮，无论是否被点击或没有，你需要它只有当按下按钮来增加？

<?php 
session_start(); 

// Reset to 1 
if(isset($_POST['reset'])){unset($_SESSION['number']);} 

// Set or increment session number only if button is clicked. 
if(empty($_SESSION['number'])){ 
    $_SESSION['number']=1; 
}elseif(isset($_POST['next'])){ 
    $_SESSION['number']++; 
} 

echo ' 
<form action="" method="POST"> 
    <input class="big_b" type="submit" name="next" value="Next" /> 
    <input type="submit" name="reset" value="Reset" /> 
</form>'; 

echo $_SESSION['number']; 
?>