private function getPhpBinary()
{
if (isset($this->config['php'])) {
return $this->config['php'];
}
if (getenv('TERMINUS_PHP')) {
$php_bin = getenv('TERMINUS_PHP');
} elseif (defined('PHP_BINARY')) {
$php_bin = PHP_BINARY;
} else {
$php_bin = 'php';
}
return $php_bin;
}