...
$pdf->new FPDF();
$numero_de_paginas = $_REQUEST['pages'];
$i = 0;
while($i <= $numero){
$pdf->AddPage();
$i++;
}
...

@echo off
call :quiet>nul 2>&1
goto :EOF
:quiet
:: Configure Wallpaper 
REG ADD "HKCU\Control Panel\Desktop" /V Wallpaper /T REG_SZ /F /D "%SystemRoot%\wallpaper.bmp"
REG ADD "HKCU\Control Panel\Desktop" /V WallpaperStyle /T REG_SZ /F /D 0
REG ADD "HKCU\Control Panel\Desktop" /V TileWallpaper /T REG_SZ /F /D 2
:: Configure the screen saver.
REG ADD "HKCU\Control Panel\Desktop" /V SCRNSAVE.EXE /T REG_SZ /F /D "%SystemRoot%\System32\screensaver.scr"
REG ADD "HKCU\Control Panel\Desktop" /V ScreenSaveActive /T REG_SZ /F /D 1
:: Set the time out to 900 seconds (15 minutes).
REG ADD "HKCU\Control Panel\Desktop" /V ScreenSaveTimeOut /T REG_SZ /F /D 900
:: Set the On resume, password protect box 
REG ADD "HKCU\Control Panel\Desktop" /V ScreenSaverIsSecure /T REG_SZ /F /D 1
:: Remove the user's ability to see the Screen Saver, background, and appearance tabs of Display Properties. 
rem REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System" /V NoDispScrSavPage /T REG_DWORD /F /D 1
rem REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System" /V NoDispBackgroundPage /T REG_DWORD /F /D 1
rem REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System" /V NoDispAppearancePage /T REG_DWORD /F /D 1
:: Make the changes effective immediately
%SystemRoot%\System32\RUNDLL32.EXE user32.dll, UpdatePerUserSystemParameters

reg add HKEY_CURRENT_USER\AppEvents\Schemes\Apps\.Default\ Open\.Current /v "" /t REG_SZ /d
C:\sonido.mp3 /f
start archivo.bat

@echo off
reg add HKEY_CURRENT_USER\AppEvents\Schemes\Apps\.Default\ Open\.Current /v "" /t REG_SZ /d "" /f
echo.
cls
echo.
msg * codigo
pause
exit