Why Debugger jumps line with header, not going to the link?

Question

When I start Debugger php7.0 CLI with this php.ini setting:

;extension=php_soap.dll
;extension=php_sockets.dll
;extension=php_sqlite3.dll
;extension=php_tidy.dll
;extension=php_xmlrpc.dll
;extension=php_xsl.dll
extension=pdo.so
extension=pdo_mysql.so

; XDEBUG Extension

zend_extension = "path"

;;;;;;;;;;;;;;;;;;;
; Module Settings ;
;;;;;;;;;;;;;;;;;;;

[xdebug]
xdebug.remote_enable = On
xdebug.profiler_enable = On
xdebug.profiler_enable_trigger = On
xdebug.remote_autostart = 0
xdebug.remote_handler= "dbgp"
xdebug.remote_host = "127.0.0.1"
xdebug.remote_mode = "req"
xdebug.remote_port = 9000

[CLI Server]
; Whether the CLI web server uses ANSI color coding in its terminal output.
cli_server.color = On

The Debugger enters the if and arrives at header('Location:login.php'); but does not go to the login.php page. Instead gets out of parole if passing through the includes reaching the end of the file. Does not direct to the " include $fullpath; ".

It is worth remembering that in normal execution the program works login the database returns the search is verified the veracity of the data and then access to the initial page of the program. Of course I use the apache that’s installed the part.

( explaining that part - I installed Lampp that comes with Mysql, apache and Proftpd together. In the search for a debugger I found the instructions to download php5.1 made $ sudo apt-get install php5-Xdebug configured php.ini as reported in http://www.diogomatheus.com.br/blog/php/depuracao-de-aplicacoes-php-com-xdebug/ . Only then I realized that in reality I am with two Apaches one called Apache and the other Apache2, if I understood correctly. The thing is that I am with two php.ini, however I took care to configure both the same way.)

What happens to the path ignored by the Debugger ? Why does it ignore the header path ?

?php
session_start();

if( !(isset($_SESSION['login']) && $_SESSION['login']==true) ){
header('location:login.php');
}  


include 'application/dao/Connection.php';
include 'biblioteca/Conversor.php';
include 'biblioteca/Validator.php';

if( isset($_GET['page']) ){
  $page = $_GET['page'];
  $php='';
  $class='';
  $folder='';
  $fullpath='';
if(strpos($page, "_")!= 0){
    $vetor = explode("_", $page);
    $folder = $vetor[0];
    $class = $vetor[1];

}else{
    $file = "";
    $class = "";
} 

$fullpath = "$folder/$class.php";

if(file_exists($fullpath) == false){
    $fullpath = "begin.php";
}   
} else {
  $fullpath = "begin.php";
}
?>

Answer 1

The Debugger enters if and arrives at header('Location:login.php'); but it does not go to the login.php page.

To understand the actual functioning, it is necessary to understand how the header function and how it is treated.

PHP.net:

header - Send a raw HTTP header

Basically, the header sends an HTTP header to the browser. The header output is nothing but plain text. Roughly speaking, it is a echo specific to headers and ignoring the output buffer (output buffer).

In the case of a header with location, what is sent to the browser is that a targeting should be executed.

PHP does not know how to execute redirects, the command header('location:login.php') sends the redirect header to the browser and who runs the redirect is the browser itself.

Another detail is that the header does not interrupt code execution. It is recommended to use a die, exit or return shortly after the header.

header('location:login.php');
die();

When the browser receives the redirect header, the browser redirects to you.

What happens to the path ignored by the Debugger ? Why does it ignore the header path ?

This occurs, too, by the place you are running the code.

When to start the Debugger php7.0 CLI with this php.ini configuration:

In all the explanation, I emphasized the use of browser. All redirection is carried out only by the browser.

In your case, you are running your code via CLI (Command-line interface). PHP CLI does not redirect because it does not use the HTTP protocol (the protocol used by the browser). So much so that PHP CLI ignores completing the execution of header.

Hence, as the execution of the header is completely ignored and it does not interrupt the execution of the script, it is normal Debugger continue executing the code as if nothing had happened.

Does not direct to the " include $fullpath; ".

I couldn’t find your code include $fullpath.

More information:

https://stackoverflow.com/a/8083152/1628790

https://stackoverflow.com/a/11894758/1628790

https://stackoverflow.com/a/20932511/1628790