International PHP Conference Munich 2024


(PHP 4 >= 4.0.2, PHP 5, PHP 7, PHP 8)

curl_versionGets cURL version information


curl_version(): array|false

Returns information about the cURL version.


This function has no parameters.

Return Values

Returns an associative array with the following elements:

Key Value description
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
features A bitmask of the CURL_VERSION_XXX constants
protocols An array of protocols names supported by cURL


Version Description
8.0.0 The optional age parameter has been removed.
7.4.0 The optional age parameter has been deprecated; if a value is passed, it is ignored.


Example #1 curl_version() example

This example will check which features that's available in cURL build by using the 'features' bitmask returned by curl_version().

// Get curl version array
$version = curl_version();

// These are the bitfields that can be used
// to check for features in the curl build
$bitfields = Array(

$bitfields as $feature)
$feature . ($version['features'] & constant($feature) ? ' matches' : ' does not match');

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