Help me to solve this if..else issue

Guys please help me to solve the bug of below script.

<?php 
  //Check page incomes
  session_start(); 
  if(isset($_SESSION['page'])){
  $page1=$_SESSION['page'];      
  } 
  //If no data show as error 1
  else{
    echo '<br/>Error 1';
  }   
  
  //Start selection
  if($page1==2){
      $title=('Testing title 1');
      $description=('Testing description 1'); 
  }  
  elseif($page1==3){
      $title=('Testing title 2');
      $description=('Testing description 2');
  }    
  
  //If not in above range echo error 2
  else{
      echo $page1;
      echo '<br/>Error 2';
  }    
  
  //Register new sessions
  if(isset($title)){ 
      $_SESSION['title']=$title;
      $_SESSION['description']=$description;       
      header("location:about.php");
     echo $title;
  }  
  
?>

PHP:

This is written to select the correct title with description for the registered session parameter numbers.When $page1=2 or 3 this gives the following error(I need to register correct title session and description session to send to another page)

 Error 1
Notice: Undefined variable: page1 in C:\wamp\www\Kingmax\page_check.php on line 13

Notice: Undefined variable: page1 in C:\wamp\www\Kingmax\page_check.php on line 17

Notice: Undefined variable: page1 in C:\wamp\www\Kingmax\page_check.php on line 24

Error 2

HTML:

But if those parameters out of selection range this prints incoming parameter and error correctly like below.

5
Error 2

HTML:

So I commented the last session registration section and tell apache to print my title and description.In that case it returns the correct title with correct description.I think the problem is with my session section.This is what I did.

//If not in above range echo error 2
else{
echo $page1;
echo '<br/>Error 2';
}

  //Register new sessions
 /* if(isset($title)){ 
      $_SESSION['title']=$title;
      $_SESSION['description']=$description;       
      header("location:about.php");
     echo $title;      
  }                 */
  
    echo $title;
    echo $description;
  
?>

PHP:

Then it returns

Testing title 1Testing description 1

HTML:

I can't understand the error guys please help me to solve this.


Thank you

 

declare page1 first

<?php 
  //Check page incomes
  session_start(); 

$page1 = -1;

  if(isset($_SESSION['page'])){
  $page1=$_SESSION['page'];      
  } 
  //If no data show as error 1
  else{
    echo '<br/>Error 1';
  }   
  
  //Start selection
  if($page1==2){
      $title=('Testing title 1');
      $description=('Testing description 1'); 
  }  
  elseif($page1==3){
      $title=('Testing title 2');
      $description=('Testing description 2');
  }    
  
  //If not in above range echo error 2
  else{
      echo $page1;
      echo '<br/>Error 2';
  }    
  
  //Register new sessions
  if(isset($title)){ 
      $_SESSION['title']=$title;
      $_SESSION['description']=$description;       
      header("location:about.php");
     echo $title;
  }  
  
?>

PHP:

 

Thanx for your reply dude.

I tried that then it shows this on the browser

Error 1-1
Error 2
Notice: Undefined variable: title in C:\wamp\www\Kingmax\page_check.php on line 38

Notice: Undefined variable: description in C:\wamp\www\Kingmax\page_check.php on line 39

HTML:

 

Anyway, you can disable notices by only enabling some error reports.

Try adding this on top of your codes. (Somewhere after <?php)

error_reporting(E_ERROR | E_PARSE);

Code (markup):

 

Add somewhere at the beginning of the script: $title = '';$description = '';

 

Ya guys it had so many issues I rewrote it with a free mind now it's working.


Thank you very much for all your responses