Php 需要访问isset函数外部的变量

首先，我是PHP新手，我还在学习，这个网站在我的学习上帮了我很大的忙，所以感谢所有的贡献者

我需要在第二个

isset（）

函数中访问两个变量

$t1selected

和

$t2selected

我真的尝试了我所知道的一切。我仍在学习和使用《PHP完整参考》一书，这本书只提到，当您将变量声明为全局变量时，您可以跨所有函数访问它们……在这种情况下，显然不是这样

以下是我的第一个功能的一部分：

var_dump确认全局变量持有正确的值

// This code gets executed after form has been submitted
function getPlayers(){
if (isset($_POST['select'])) 
{
    global $t1select;
    global $t2select;
 // get 1st team selected
 foreach($_REQUEST["team1_select"] as $t1select) 
 {
    $t1select = $t1select;
 } //end foreach

 // get second team selected
 foreach($_REQUEST["team2_select"] as $t2select) 
 {
  $t2select = $t2select;
 } //end foreach

var_dump($t1select);
var_dump($t2select);

//SOME MORE CODE

现在，在我的第二个函数中，我尝试引用两个变量

$t1selected

和

$t2selected

对它们进行var_转储，两个变量的值都为null

下面是我的第二个功能的一部分

// THIS PART IS TO GET THE STARTING PLAYERS
function PlayerAttributes(){
if (isset($_POST['teamselect'])) {
global $t1select;
global $t2select;
var_dump($t1select);
var_dump($t2select);
 // Get Selected Team For Team1
 foreach($_REQUEST['team1selected'] as $team1players) {
$team1players;
 } //end foreach1
 foreach($_REQUEST['team2selected'] as $team2players) {
   $team2players;
 } //endfor each2
//SOME MORE CODE

我的问题

// THIS PART IS TO GET THE STARTING PLAYERS
function PlayerAttributes(){
if (isset($_POST['teamselect'])) {
global $t1select;
global $t2select;
var_dump($t1select);
var_dump($t2select);
 // Get Selected Team For Team1
 foreach($_REQUEST['team1selected'] as $team1players) {
$team1players;
 } //end foreach1
 foreach($_REQUEST['team2selected'] as $team2players) {
   $team2players;
 } //endfor each2
//SOME MORE CODE

---

如何在代码中的所有函数中访问两个变量

$t1selected

和

$t2selected

，不要使用全局关键字，只需将变量的值传递给函数即可

回显函数中的值

像这样传递值

PlayerAttributes($t1select,$t2select);





function PlayerAttributes($t1select,$t2select){
        if (isset($_POST['teamselect'])) {

            var_dump($t1select);
            var_dump($t2select);
            // Get Selected Team For Team1
            foreach($_REQUEST['team1selected'] as $team1players) {
               echo $team1players;
            } //end foreach1
            foreach($_REQUEST['team2selected'] as $team2players) {
               echo $team2players;
            }

        }
        }

---

这不是很好的编码实践，但根据您提到的场景，另一个选项是：

<?php
define('T1_SELECT',$t1select);
define('T2_SELECT',$t2select);
?>

它将在全球范围内可用，您可以通过 T1_选择 及 T2_选择

谢谢

---

Amit

不要使用全局关键字！为什么不把它们作为参数传递给函数呢？同时

$t1select=$t1select

当

$t1select

被声明为全局时，会弄乱您的编码逻辑。@ShankarDamodaran这样做会导致错误“注意未定义的变量”，然后会导致错误“未定义的变量：t1select”“未定义的变量：t2select”你传递了值吗？我传递了包含该值的变量