PHP5中文手册·Gets cURL version information -- 追寻梦想＞编程乐园＞PHP 编程

array curl_version ([ int $age ] )

Returns information about the cURL version.

Returns an associative array with the following elements:

version_number	cURL 24 bit version number
version	cURL version number, as a string
ssl_version_number	OpenSSL 24 bit version number
ssl_version	OpenSSL version number, as a string
libz_version	zlib version number, as a string
host	Information about the host where cURL was built
age
features	A bitmask of the CURL_VERSION_XXX constants
protocols	An array of protocols names supported by cURL