变量内部isset conditon不在文件外使用

Question

这里有两个文件

control.php 和diaplay.php

control.php

请帮助我的大学项目停止-------

if(isset($_REQUEST['submit']))
{

        $a=$_REQUEST['txt_email'];
        $b=$_REQUEST['txt_name'];
        $c=$_REQUEST['txt_password'];
        $d=$_REQUEST['txt_phno'];
        $e=$_REQUEST['r1'];
        $f=$_REQUEST['sel_business'];


        $g=$_REQUEST['txt_company_name'];
        $h=$_REQUEST['txt_address'];
        $results=$ob1->insert($a,$b,$c,$d,$e,$f,$g,$h);

        ==============================================
        === however inside print_r($results);=========
       ===============================================

   }
  34 line here----------->>>>>>>>>> print_r($results); 

和display.php

包括（ 'control.php'）;

我使用它可以说$ results未定义

Answer 1

你包含了control.php，它再次检查你的情况下错误的isset条件。你可以检查一下 -

    if(isset($_REQUEST['submit']))
    {

            $a=$_REQUEST['txt_email'];
            $b=$_REQUEST['txt_name'];
            $c=$_REQUEST['txt_password'];
            $d=$_REQUEST['txt_phno'];
            $e=$_REQUEST['r1'];
            $f=$_REQUEST['sel_business'];


            $g=$_REQUEST['txt_company_name'];
            $h=$_REQUEST['txt_address'];
            $results=$ob1->insert($a,$b,$c,$d,$e,$f,$g,$h);

       }
  else 
   {
     $result = "this is else condition";

    }
    print_r($results);

Answer 2

$results = ""; //If it's returning STRING
$results = array(); //If it's returning ARRAY
if(isset($_REQUEST['submit']))
{
  //YOUR CODE
}

你没有得到它，因为只有当你的IF条件成立时才会声明