Add support for CURLINFO_QUEUE_TIME_T in curl_getinfo()

UPGRADING

@@ -193,6 +193,11 @@ PHP 8.5 UPGRADE NOTES
     used by a cURL transfer. It is primarily useful when connection reuse or
     connection pooling logic is needed in PHP-level applications. When
     curl_getinfo() returns an array, this value is available as the "conn_id" key.
+  . Added support for CURLINFO_QUEUE_TIME_T (libcurl >= 8.6.0) to the curl_getinfo()
+    function. This constant allows retrieving the time (in microseconds) that the
+    request spent in libcurl’s connection queue before it was sent.
+    This value can also be retrieved by passing CURLINFO_QUEUE_TIME_T to the
+    curl_getinfo() $option parameter. This requires libcurl 8.6.0 or later.
 
 - DOM:
   . Added Dom\Element::$outerHTML.
@@ -523,6 +528,7 @@ PHP 8.5 UPGRADE NOTES
   . CURLINFO_HTTPAUTH_USED.
   . CURLINFO_PROXYAUTH_USED.
   . CURLINFO_CONN_ID.
+  . CURLINFO_QUEUE_TIME_T.
   . CURLOPT_INFILESIZE_LARGE.
   . CURLFOLLOW_ALL.
   . CURLFOLLOW_OBEYCODE.

ext/curl/curl.stub.php

@@ -3054,6 +3054,13 @@
  * @cvalue CURLAUTH_BEARER
  */
 const CURLAUTH_BEARER = UNKNOWN;
+#if LIBCURL_VERSION_NUM >= 0x080600 /* Available since 8.6.0 */
+/**
+ * @var int
+ * @cvalue CURLINFO_QUEUE_TIME_T
+ */
+const CURLINFO_QUEUE_TIME_T = UNKNOWN;
+#endif
 /**
  * @var int
  * @cvalue CURLINFO_APPCONNECT_TIME_T

ext/curl/interface.c

@@ -2571,6 +2571,11 @@ PHP_FUNCTION(curl_getinfo)
 		if (curl_easy_getinfo(ch->cp, CURLINFO_APPCONNECT_TIME_T, &co) == CURLE_OK) {
 			CAAL("appconnect_time_us", co);
 		}
+#if LIBCURL_VERSION_NUM >= 0x080600 /* Available since 8.6.0 */
+		if (curl_easy_getinfo(ch->cp, CURLINFO_QUEUE_TIME_T , &co) == CURLE_OK) {
+			CAAL("queue_time_us", co);
+		}
+#endif
 		if (curl_easy_getinfo(ch->cp, CURLINFO_CONNECT_TIME_T, &co) == CURLE_OK) {
 			CAAL("connect_time_us", co);
 		}

ext/curl/tests/curl_getinfo_CURLINFO_QUEUE_TIME_T.phpt

@@ -0,0 +1,41 @@
+--TEST--
+Curlinfo CURLINFO_QUEUE_TIME_T
+--EXTENSIONS--
+curl
+--SKIPIF--
+<?php
+$curl_version = curl_version();
+if ($curl_version['version_number'] < 0x080600) die("skip: test works only with curl >= 8.6.0");
+?>
+--FILE--
+<?php
+include 'server.inc';
+
+$host = curl_cli_server_start();
+$port = (int) (explode(':', $host))[1];
+
+$ch = curl_init();
+curl_setopt($ch, CURLOPT_URL, "{$host}/get.inc?test=file");
+curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
+
+$info = curl_getinfo($ch);
+var_dump(isset($info['queue_time_us']));
+var_dump($info['queue_time_us'] === 0); // this is always 0 before executing the transfer
+
+$result = curl_exec($ch);
+
+$info = curl_getinfo($ch);
+var_dump(isset($info['queue_time_us']));
+var_dump(is_int($info['queue_time_us']));
+var_dump(curl_getinfo($ch, CURLINFO_QUEUE_TIME_T) === $info['queue_time_us']);
+var_dump(curl_getinfo($ch, CURLINFO_QUEUE_TIME_T) > 0);
+
+?>
+--EXPECT--
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+bool(true)
+