/**
* Set the Windows Desktop Wallpaper to a given file.
*
* This function uses the FFI module, a really cool package that lets you load
* native system libraries and call them from PHP. Obviously, it needs to be
* installed.
*
* @param string $bmpFilePath Full path to the BMP file.
* @return void
*/
function setWindowsDesktop($bmpFilePath)
{
define('SPI_SETDESKWALLPAPER', 0x14);
define('SPIF_UPDATEINIFILE', 0x1);
define('SPIF_SENDWININICHANGE', 0x2);
assert(file_exists($bmpFilePath));
// Load the extension
if (!dl("php_ffi.dll")) {
throw new Exception('Cound not load the FFI extension.');
}
// declare the Win32 API function used to change desktop settings.
$ffi = new FFI(<<<IDL
[lib='User32.dll']
int SystemParametersInfoA(int uAction, int uParam, char *lpvParam, int fuWinIni);
[lib='Kernel32.dll']
int GetLastError();
IDL
);
// call the Windows API to update the desktop background.
$ret = $ffi->SystemParametersInfoA(SPI_SETDESKWALLPAPER, 0, $bmpFilePath, SPIF_UPDATEINIFILE || SPIF_SENDWININICHANGE);
if ($ret == 0) {
$error = $ffi->GetLastError();
throw new Exception("The call to the Windows API failed (error {$error}).");
}
}
<?php
$ffi = new FFI("[lib='msvcrt.dll'] int _getch();");
while (true) {
// get a character from the keyboard
$c = chr($ffi->_getch());
if ("\r" == $c || "\n" == $c) {
// if it's a newline, break out of the loop, we've got our password
break;
} elseif ("" == $c) {
/* if it's a backspace, delete the previous char from $password */
$password = substr_replace($password, '', -1, 1);
} elseif ("" == $c) {
// if it's Control-C, clear $password and break out of the loop
$password = NULL;
break;
} else {
// otherwise, add the character to the password
$password .= $c;
}
}
