测试PHP服务端是否支持SSL

$w = stream_get_wrappers();echo 'openssl: ',  extension_loaded  ('openssl') ? 'yes':'no', "\n";echo 'http wrapper: ', in_array('http', $w) ? 'yes':'no', "\n";echo 'https wrapper: ', in_array('https', $w) ? 'yes':'no', "\n";echo 'wrappers: ', var_export($w);

会输出类似下面的信息：

openssl: yeshttp wrapper: yeshttps wrapper: yeswrappers: array(11) {  [...]}