Question

我有一個內部循環的窗體。 這是我的代碼：

<form action="<?php echo $_SERVER['PHP_SELF'];?>" method="post">  
<?php 
for ($i = 1; $i <= 2; $i++) { 
    echo "Numero "; 
    echo $i; 
    echo "<input type='text' name='number2[$i]' id='number2{$i}' />"; 
} 

    ?> 
    <input type="submit" name="submitbutton" value="Confirm!"> 
    </form> 
    <?php 
    print_r($_POST ); 
if(!isset($submitbutton)) { 
    if (isset($_POST['number2']) != "") { 
     echo "<b>{$_POST['number2']}</b>, !\n"; 
     $nI = $_POST['number2']; 
    } 
} 
?> 

我得到的輸出是：

陣列（[數字2] =>數組（[1] => 3 [2] => 4）[提交按鈕] =>確認！）Array，！

我想知道如何將數字放在會話中。

例如Session[1]=3, Session[2]=4

我嘗試用數組和foreach，但我總是得到錯誤。

Answer 1

像這樣的東西應該爲你工作：

<?php 
// Start a PHP Session 
session_start(); 
?> 
<form action="<?php echo $_SERVER['PHP_SELF'];?>" method="post">  
    <?php 
    for ($i = 1; $i <= 2; $i++) { 
     echo "Numero "; 
     echo $i; 
     echo "<input type='text' name='number2[$i]' id='number2{$i}' />"; 
    } 
    ?> 
    <input type="submit" name="submitbutton" value="Confirm!"> 
</form> 
<?php 
// If the form was submitted and number2 is an array 
if(isset($_POST['submitbutton']) 
     && isset($_POST['number2']) 
     && is_array($_POST['number2'])) { 

    // Loop through each posted value and save it to the session 
    foreach ($_POST['number2'] as $key => $value) { 
     $_SESSION["number2_{$key}"] = $value; 
    } 
} 
echo "number2_1 = " . $_SESSION["number2_1"] . "<br />"; 
echo "number2_2 = " . $_SESSION["number2_2"] . "<br />"; 
?> 

Answer 2

你得到了什麼錯誤？請注意，isset()僅返回TRUE或FALSE，因此isset($_POST['number2'])永遠不會等於空字符串。