/**
* Use pager set in the environment (i.e. $_ENV['PAGER']).
*
* @param string $output Output (from the output buffer).
* @param int $mode Mode (from the output buffer).
* @param string $type Type. Please, see self::LESS or self::MORE.
* @return string
*/
public static function pager($output, $mode, $type = null)
{
static $process = null;
if ($mode & PHP_OUTPUT_HANDLER_START) {
$pager = null !== $type ? Console\Processus::locate($type) : (isset($_ENV['PAGER']) ? $_ENV['PAGER'] : null);
if (null === $pager) {
return $output;
}
$process = new Console\Processus($pager, null, [['pipe', 'r']]);
$process->open();
}
$process->writeAll($output);
if ($mode & PHP_OUTPUT_HANDLER_FINAL) {
$process->close();
}
return null;
}
