ext/curl: Add feature_info assoc array to curl_version() (#13439)

The `phpinfo()` section of the Curl extension lists individual features
supported by the particular ext-Curl + libcurl build. However, the
`curl_version()` function return values do not indicate the same level of
details.

`curl_version()` has a `protocols` key that returns an array of all protocols
supported by the build. But the `features` key is a bitmask of all the features.
Checking the availability of certain feature requires knowing the corresponding
`CURL_VERSION` constant, and checking the availability of the constant and a
bitmask check for it in the `features` value.

For example, to determine HTTP2 support, it requires evaluating:

```php
defined('CURL_VERSION_HTTP2') && (curl_version()['features'] & CURL_VERSION_HTTP2 === CURL_VERSION_HTTP2)
```

To make feature availability checks more intuitive, this adds a new
`feature_list` key to `curl_version()` output array.

With it, checking for individual features availability is easier, and does
not require inspecting the availability of the `CURL_VERSION` constant and
the `features` key.

```php
!empty(curl_version()['feature_list']['HTTP2']);
```

Author: Ayesh

NEWS

@@ -18,6 +18,7 @@ PHP                                                                        NEWS
 - Curl:
   . Deprecated the CURLOPT_BINARYTRANSFER constant. (divinity76)
   . Bumped required libcurl version to 7.61.0. (Ayesh)
+  . Added feature_list key to the curl_version() return value (Ayesh)
 
 - Date:
   . Added DateTime[Immutable]::createFromTimestamp. (Marc Bennewitz)

UPGRADING

@@ -252,6 +252,9 @@ PHP 8.4 UPGRADE NOTES
 
 - Curl:
   . The CURLOPT_BINARYTRANSFER constant is deprecated.
+  . curl_version() returns an additional feature_list value, which is an
+    associative array of all known Curl features, and whether they are
+    supported (true) or not (false).
 
 - Date:
   . Calling DatePeriod::__construct(string $isostr, int $options = 0) is

ext/curl/interface.c

@@ -261,6 +261,7 @@ PHP_MINFO_FUNCTION(curl)
 	php_info_print_table_row(2, "Age", str);
 
 	/* To update on each new cURL release using src/main.c in cURL sources */
+	/* make sure to sync this list with curl_version as well */
 	if (d->features) {
 		struct feat {
 			const char *name;
@@ -1000,6 +1001,68 @@ PHP_FUNCTION(curl_version)
 	CAAL("version_number", d->version_num);
 	CAAL("age", d->age);
 	CAAL("features", d->features);
+	/* Add an array of features */
+	{
+		struct feat {
+        	const char *name;
+        	int bitmask;
+		};
+
+		unsigned int i;
+		zval feature_list;
+		array_init(&feature_list);
+
+		/* Sync this list with PHP_MINFO_FUNCTION(curl) as well */
+		static const struct feat feats[] = {
+			{"AsynchDNS", CURL_VERSION_ASYNCHDNS},
+			{"CharConv", CURL_VERSION_CONV},
+			{"Debug", CURL_VERSION_DEBUG},
+			{"GSS-Negotiate", CURL_VERSION_GSSNEGOTIATE},
+			{"IDN", CURL_VERSION_IDN},
+			{"IPv6", CURL_VERSION_IPV6},
+			{"krb4", CURL_VERSION_KERBEROS4},
+			{"Largefile", CURL_VERSION_LARGEFILE},
+			{"libz", CURL_VERSION_LIBZ},
+			{"NTLM", CURL_VERSION_NTLM},
+			{"NTLMWB", CURL_VERSION_NTLM_WB},
+			{"SPNEGO", CURL_VERSION_SPNEGO},
+			{"SSL",  CURL_VERSION_SSL},
+			{"SSPI",  CURL_VERSION_SSPI},
+			{"TLS-SRP", CURL_VERSION_TLSAUTH_SRP},
+			{"HTTP2", CURL_VERSION_HTTP2},
+			{"GSSAPI", CURL_VERSION_GSSAPI},
+			{"KERBEROS5", CURL_VERSION_KERBEROS5},
+			{"UNIX_SOCKETS", CURL_VERSION_UNIX_SOCKETS},
+			{"PSL", CURL_VERSION_PSL},
+			{"HTTPS_PROXY", CURL_VERSION_HTTPS_PROXY},
+			{"MULTI_SSL", CURL_VERSION_MULTI_SSL},
+			{"BROTLI", CURL_VERSION_BROTLI},
+#if LIBCURL_VERSION_NUM >= 0x074001 /* Available since 7.64.1 */
+			{"ALTSVC", CURL_VERSION_ALTSVC},
+#endif
+#if LIBCURL_VERSION_NUM >= 0x074200 /* Available since 7.66.0 */
+			{"HTTP3", CURL_VERSION_HTTP3},
+#endif
+#if LIBCURL_VERSION_NUM >= 0x074800 /* Available since 7.72.0 */
+			{"UNICODE", CURL_VERSION_UNICODE},
+			{"ZSTD", CURL_VERSION_ZSTD},
+#endif
+#if LIBCURL_VERSION_NUM >= 0x074a00 /* Available since 7.74.0 */
+			{"HSTS", CURL_VERSION_HSTS},
+#endif
+#if LIBCURL_VERSION_NUM >= 0x074c00 /* Available since 7.76.0 */
+			{"GSASL", CURL_VERSION_GSASL},
+#endif
+		};
+
+        for(i = 0; i < sizeof(feats) / sizeof(feats[0]); i++) {
+			if (feats[i].name) {
+				add_assoc_bool(&feature_list, feats[i].name, d->features & feats[i].bitmask ? true : false);
+			}
+		}
+
+		CAAZ("feature_list", &feature_list);
+	}
 	CAAL("ssl_version_number", d->ssl_version_num);
 	CAAS("version", d->version);
 	CAAS("host", d->host);

ext/curl/tests/curl_version_features-array.phpt

@@ -0,0 +1,54 @@
+--TEST--
+Test curl_version() - feature_list functionality
+--EXTENSIONS--
+curl
+--FILE--
+<?php
+    $info_curl = curl_version();
+    print_r(array_map(fn ($v) => get_debug_type($v), $info_curl['feature_list']));
+
+    ob_start();
+    phpinfo();
+    $phpinfo = ob_get_clean();
+
+    foreach ($info_curl['feature_list'] as $key => $value) {
+        if (!is_bool($value)) {
+            throw new Exception('Found non-bool value');
+        }
+
+        if (!str_contains($phpinfo, $key .' => ' . $value ? 'Yes' : 'No')) {
+            throw new Exception($key . ' not found in Curl phpinfo()');
+        }
+    }
+
+    echo "Complete";
+?>
+--EXPECTF--
+Array
+(
+    [AsynchDNS] => bool
+    [CharConv] => bool
+    [Debug] => bool
+    [GSS-Negotiate] => bool
+    [IDN] => bool
+    [IPv6] => bool
+    [krb4] => bool
+    [Largefile] => bool
+    [libz] => bool
+    [NTLM] => bool
+    [NTLMWB] => bool
+    [SPNEGO] => bool
+    [SSL] => bool
+    [SSPI] => bool
+    [TLS-SRP] => bool
+    [HTTP2] => bool
+    [GSSAPI] => bool
+    [KERBEROS5] => bool
+    [UNIX_SOCKETS] => bool
+    [PSL] => bool
+    [HTTPS_PROXY] => bool
+    [MULTI_SSL] => bool
+    [BROTLI] => bool
+%A
+)
+Complete