獲得價值

Question

你好，我有我的頁面viewsensordata.php

... 

$refresh = ($_POST['refresh']); 

$link_address="viewsensordata.php?view=".$view; 
?> 
<form method="post" action="<?php echo $link_address;?>"> 
<select id="refresh" name="refresh"> 
    <option value="-">Select Seconds</option> 
    <option value="1">1 Second</option> 
    <option value="2">2 Seconds</option> 
    <option value="3">3 Seconds</option> 
    <option value="4">4 Seconds</option> 
    <option value="5">5 Seconds</option> 
    <option value="10">10 Seconds</option> 
    <option value="15">15 Seconds</option> 
    <option value="30">30 Seconds</option> 
    <option value="60">60 Seconds</option> 
</select> 
<input type="submit" value="Refresh" name="refresh_rate"/> 
</form> 
<meta http-equiv="Refresh" content="<?php echo $refresh;?>;URL=refreshsensorData.php"> 
<br /> 

下面的形式和我想的$refresh的價值得到另一個名爲頁viewsensordata2.php

在我viewsensordata2.php我有$refresh = ($_GET['refresh']);爲了從其他頁面獲取它，但它不起作用。我該如何解決這個問題？

Answer 1

<?php 
$link_address="viewsensordata.php?view=".$view; 
?> 
<form method="post" action="<?php echo $link_address;?>"> 
<select id="refresh" name="refresh"> 
    <option value="-">Select Seconds</option> 
    <option value="1">1 Second</option> 
    <option value="2">2 Seconds</option> 
    <option value="3">3 Seconds</option> 
    <option value="4">4 Seconds</option> 
    <option value="5">5 Seconds</option> 
    <option value="10">10 Seconds</option> 
    <option value="15">15 Seconds</option> 
    <option value="30">30 Seconds</option> 
    <option value="60">60 Seconds</option> 
</select> 
<input type="submit" value="Refresh" name="refresh_rate"/> 
</form> 

然後在你的第二頁，你可以刷新它是這樣的：

<?php 
if(isset($_POST) && isset($_POST['refresh'])){ 
    $sec = $_POST['refresh']; 
} 
elseif(isset($_GET) && isset($_GET['seconds'])){ 
    $sec = $_GET['seconds']; 
} 
else{ 
    $sec = 10; // your defualt seconds, if it is not set from form or URL 
} 
?> 

<meta http-equiv="Refresh" content="<?php echo $sec ;?> URL=<?php echo $_SERVER['PHP_SELF']; ?>?seconds=$sec">