显示不同文件输出的php文件

我对PHP编程非常陌生。我试图用Drupal编写这个定制php代码，看到了这种奇怪的行为。基本上，我有两个用户可以点击的php文件，第一个php文件显示第二个php文件的输出。我没有把第二个文件包括在第一个文件中

Home.php-第一个文件（最后输出“我为什么要执行”）

HomeView.BL.inc

<?php
include 'db.inc';
include 'dao.inc'; - has a class called IDA_Map
?>

<?php
echo "why am i executing";
include 'db.inc';
include 'dao.inc';
?>

<?php
require_once'db.inc';
require_once'dao.inc'; - has a class called IDA_Map
?>

<?php
echo "why am i executing";
require_once'db.inc';
require_once'dao.inc';
?>

FacultyInternshipDetail.php-第二个文件

<?php 
include 'InternshipDetailView.BL.inc';
?>

实习生详细视图有限公司

<?php
include 'db.inc';
include 'dao.inc'; - has a class called IDA_Map
?>

<?php
echo "why am i executing";
include 'db.inc';
include 'dao.inc';
?>

<?php
require_once'db.inc';
require_once'dao.inc'; - has a class called IDA_Map
?>

<?php
echo "why am i executing";
require_once'db.inc';
require_once'dao.inc';
?>

除了第二个文件的输出之外，我还看到了这个错误——无法重新声明类IDA_映射

我在其他帖子中读过关于“include_once”的文章，但没有想到会出现重新声明错误，因为类（IDA_映射）每个请求声明一次

---

谢谢。

将所有这些翻转到

require\u一次

<?php require_once'HomeView.BL.inc';
  //Other links to access second file 
?>

HomeView.BL.inc

<?php
include 'db.inc';
include 'dao.inc'; - has a class called IDA_Map
?>

<?php
echo "why am i executing";
include 'db.inc';
include 'dao.inc';
?>

<?php
require_once'db.inc';
require_once'dao.inc'; - has a class called IDA_Map
?>

<?php
echo "why am i executing";
require_once'db.inc';
require_once'dao.inc';
?>

FacultyInternshipDetail.php

<?php 
require_once'InternshipDetailView.BL.inc';
?>

实习生详细视图有限公司

<?php
include 'db.inc';
include 'dao.inc'; - has a class called IDA_Map
?>

<?php
echo "why am i executing";
include 'db.inc';
include 'dao.inc';
?>

<?php
require_once'db.inc';
require_once'dao.inc'; - has a class called IDA_Map
?>

<?php
echo "why am i executing";
require_once'db.inc';
require_once'dao.inc';
?>

尝试两次包含同一文件时包含中断。

---

还可以查找composer并使用php框架，这样您就不必担心这些了

将所有这些翻转到

require\u一次

<?php require_once'HomeView.BL.inc';
  //Other links to access second file 
?>

HomeView.BL.inc

<?php
include 'db.inc';
include 'dao.inc'; - has a class called IDA_Map
?>

<?php
echo "why am i executing";
include 'db.inc';
include 'dao.inc';
?>

<?php
require_once'db.inc';
require_once'dao.inc'; - has a class called IDA_Map
?>

<?php
echo "why am i executing";
require_once'db.inc';
require_once'dao.inc';
?>

FacultyInternshipDetail.php

<?php 
require_once'InternshipDetailView.BL.inc';
?>

实习生详细视图有限公司

<?php
include 'db.inc';
include 'dao.inc'; - has a class called IDA_Map
?>

<?php
echo "why am i executing";
include 'db.inc';
include 'dao.inc';
?>

<?php
require_once'db.inc';
require_once'dao.inc'; - has a class called IDA_Map
?>

<?php
echo "why am i executing";
require_once'db.inc';
require_once'dao.inc';
?>

尝试两次包含同一文件时包含中断。

---

还可以查找composer并使用php框架，这样您就不必担心这些了

引用类源时，请始终使用一次

include\u

。始终使用

.php

文件结尾，而不是

.inc

（除非您有逻辑.htaccess阻止外部访问任何.inc文件）。谢谢。因此，我为dao.inc.将include改为include_一次。并删除重新声明错误。包含文件中声明的变量/类的生存期是多少。我以为他们只为那个浏览器请求而活。它一直活到那个脚本执行的末尾。但如果您在一次执行中多次包含它（无论是有意还是无意通过嵌套包含），您都会得到该错误。在引用类源时，请始终使用

include\u once

。始终使用

.php

文件结尾，而不是

.inc

（除非您有逻辑.htaccess阻止外部访问任何.inc文件）。谢谢。因此，我为dao.inc.将include改为include_一次。并删除重新声明错误。包含文件中声明的变量/类的生存期是多少。我以为他们只为那个浏览器请求而活。它一直活到那个脚本执行的末尾。但如果在一次执行中多次包含它（无论是有意还是无意，通过嵌套包含），您都会得到该错误。