Supported Versions: PHP 4, PHP 5, PHP 7, PHP 8
Opens file or URL
fopen(    string $filename,    string $mode,    bool $use_include_path false,    ?resource $context null): resource|false
    {

        static 
$isTtySupported;



        
$input = (defined('STDIN') ? STDIN fopen('php://input''r+'));



        if (
$isTtySupported === null && function_exists('proc_open')) {

            
$isTtySupported = (bool) @proc_open('echo 1 >/dev/null', [['file''/dev/tty''r'], ['file''/dev/tty''w'], ['file''/dev/tty''w']], $pipes);
    private function hasVt100Support(): bool

    
{

        return 
function_exists('sapi_windows_vt100_support') && sapi_windows_vt100_support(fopen('php://stdout''w'));

    }