我正在使用 PHP 和 JavaScript，在处理confirm()JavaScript 中的函数时遇到了问题。
假设我有一个页面 add.php，首先我接收到从另一个页面传递的一些参数，然后检查它们是否有效。如果是，我只是将数据插入db并返回另一个页面，如果它们无效，则会confirm()弹出一个窗口让用户选择是否继续。如果用户仍然选择继续，我希望重新加载页面并再次发送所有参数。但问题是第二次加载 add.php 时我无法获取参数。
以前我没有使用window.onload函数并confirm()弹出，而是一个< a href>链接，一切正常（请参阅最后的附加代码）。但是当我尝试使用以下代码时，相同的 url 停止工作
echo "<script type=\"text/javascript\">";
echo "window.onload = function() {
var v = confirm(\"$name is not alive, do you want to add it into system?\");
if (v) {
window.location.href= \"add.php?type=room&name=$name&area\"
+ \"=$area&description=$description&\"
+ \"capacity=$capacity&confirm=Y\";
} else {
window.location.href= \"admin.php?area=$area\";
}
}";
echo "</script>";
以下是以前的版本，window.onload()我没有使用，而是使用< a href="..." />链接，当时一切正常。get_form_var是functions.inc中的一个函数，就是用$_GET数组来获取参数。
<?php
require_once "functions.inc";
// Get non-standard form variables
$name = get_form_var('name', 'string');
$description = get_form_var('description', 'string');
$capacity = get_form_var('capacity', 'string');
$type = get_form_var('type', 'string');
$confirm = get_form_var('confirm','string');
$error = '';
// First of all check that we've got an area or room name
if (!isset($name) || ($name === ''))
{
$error = "empty_name";
$returl = "admin.php?area=$area"
. (!empty($error) ? "&error=$error" : "");
header("Location: $returl");
}
// we need to do different things depending on if its a room
// or an area
elseif ($type == "area")
{
$area = mrbsAddArea($name, $error);
$returl = "admin.php?area=$area"
. (!empty($error) ? "&error=$error" : "");
header("Location: $returl");
}
elseif ($type == "room")
{
if (isset($confirm)){
$dca_osi = getOsiVersion($name);
$room = mrbsAddRoom(
$name,
$area,
$error,
$description,
$capacity,
$dca_osi,
1
);
$returl = "admin.php?area=$area"
. (!empty($error) ? "&error=$error" : "");
header("Location:$returl");
}
else {
$dca_status= pingAddress($name);
$dca_osi = getOsiVersion($name);
if( $dca_status == 0){
$room = mrbsAddRoom(
$name,
$area,
$error,
$description,
$capacity,
$dca_osi,
0
);
$returl = "admin.php?area=$area"
. (!empty($error) ? "&error=$error" : "");
header("Location:$returl");
}
else {
print_header(
$day,
$month,
$year,
$area,
isset($room) ? $room : ""
);
echo "<div id=\"del_room_confirm\">\n";
echo "<p>\n";
echo "$name is not alive, are you sure to add it into system?";
echo "\n</p>\n";
echo "<div id=\"del_room_confirm_links\">\n";
echo "<a href=\"add.php?type=room&name"
. "=$name&area=$area&description"
. "=$description&capacity=$capacity&confirm"
. "=Y\"><span id=\"del_yes\">"
. get_vocab("YES") . "!</span></a>\n";
echo "<a href=\"admin.php?area=$area\"><span id=\"del_no\">"
. get_vocab("NO") . "!</span></a>\n";
echo "</div>\n";
echo "</div>\n";
}
}
}
function pingAddress($host)
{
$pingresult = exec("/bin/ping -c 1 $host", $outcome, $status);
if ($status==0) {
return $status;
}
else {
return 1;
}
}
function getOsiVersion($host)
{
$community = 'public';
$oid = '.1.3.6.1.4.1.1139.23.1.1.2.4';
$sysdesc = exec("snmpwalk -v 2c -c $community $host $oid");
$start = strpos($sysdesc, '"');
if ($start!==false) {
$sysdesc = substr($sysdesc, $start+1,$sysdesc.length-1);
return $sysdesc;
}
else {
return "not available";
}
}