我已經(jīng)在多表單頁面上工作了一段時間。我需要一些幫助來嘗試理解為什么當我取消設(shè)置變量時，多表單頁面無法正常工作。我在代碼中放置了一條 echo 語句來跟蹤變量值，甚至在頁面刷新后變量仍然保留。從字面上看，我必須刪除該站點的 cookie 才能取消設(shè)置該變量。這是代碼：<?phpsession_start();// Start the sessionecho $_SESSION["formatPickleball"];$_SESSION["Pickleball"] = "";// Submit button is pressedif (isset($_POST['format1'])){ $_SESSION["formatPickleball"] = $_POST['member']; $_SESSION["Pickleball"] = "hide";}if ($_SESSION["formatPickleball"] == "Captain") {$regCAP = "";// Submit button is pressedif (isset($_POST['submitCAP'])){$regCAP = "show";}$secondCAP = "";// Submit button is pressedif (isset($_POST['submit2'])){$secondCAP = "show";}$thirdCAP = "";// Submit button is pressedif (isset($_POST['submit3'])){$thirdCAP = "show";}} elseif ($_SESSION["formatPickleball"] == "Player") {$regPlay = "";// Submit button is pressedif (isset($_POST['submitPlay'])){$regPlay = "show";} }?><html><script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script><link rel="stylesheet" href="https://ajax.googleapis.com/ajax/libs/jqueryui/1.12.1/themes/smoothness/jquery-ui.css"><script src="https://ajax.googleapis.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"></script><script src="https://cdnjs.cloudflare.com/ajax/libs/chosen/1.8.7/chosen.jquery.min.js"></script><link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/chosen/1.8.7/chosen.min.css"> <script type="text/javascript"></script><body><div id="mainForm"> <h4>Are you a Captain or a Player on a Team?</h4><form method='POST'> <input type="radio" name="member" value="Captain">Captain <input type="radio" name="member" value="Player">Player<br> <input type="submit" name="format1" value="Select"> </form></div>當我添加 $_SESSION["formatPickleball"] = ""; 到php代碼的頂部，多表單無法正常工作。我有兩個問題 1) 如何在不刪除 cookie 的情況下取消設(shè)置變量？2）這是用 PHP 編寫此代碼的最有效方法嗎？
3 回答
千萬里不及你
TA貢獻1784條經(jīng)驗 獲得超9個贊
存儲在會話中的值必須在腳本執(zhí)行結(jié)束時被丟棄。
銷毀
$_SESSION使用unset($ _ SESSION)和然后使用銷毀會話本身
session_destroy();
不負相思意
TA貢獻1777條經(jīng)驗 獲得超10個贊
一旦 if 語句完成，我就可以通過使用窗口彈出窗口來清除變量。
if ($Num_CTeams > 1 && $_SESSION["Pickleball"] !="") {
echo '<script language="javascript">';
echo 'alert("Sorry, Captains can only captain up to two teams ONLY.")';
echo '</script>';
$_SESSION["formatPickleball"] = "";
}
素胚勾勒不出你
TA貢獻1827條經(jīng)驗 獲得超9個贊
<?php
session_start();
echo $_SESSION["formatPickleball"];
$_SESSION["Pickleball"] = "";
if (isset($_POST['format1']) && $_POST['format1'] && isset($_POST['member']) && $_POST['member']) {
$_SESSION["formatPickleball"] = $_POST['member'];
$_SESSION["Pickleball"] = "hide";
}
if ($_SESSION["formatPickleball"] == "Captain") {
$regCAP = isset($_POST['submitCAP']) && $_POST['submitCAP'] ? "show": "";
$secondCAP = isset($_POST['submit2']) && $_POST['submit2'] ? "show": "";
$thirdCAP = isset($_POST['submit3']) && $_POST['submit3'] ? "show": "";
}
if ($_SESSION["formatPickleball"] == "Player") {
$regPlay = isset($_POST['submitPlay']) && $_POST['submitPlay'] ? "show" : "";
}
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