ext/soap: Add test for Set-Cookie option parsing bug.

The cookie option parser uses a wrong offset to start scanning
attributes, causing cookie values containing substrings like
"path=" or "domain=" to be falsely matched as attributes.

Author: devnexen

ext/soap/tests/bugs/cookie_parse_options_offset.phpt

@@ -0,0 +1,61 @@
+--TEST--
+SOAP Set-Cookie option parsing starts at wrong offset due to variable shadowing
+--EXTENSIONS--
+soap
+--SKIPIF--
+<?php
+if (!file_exists(__DIR__ . "/../../../../sapi/cli/tests/php_cli_server.inc")) {
+    echo "skip sapi/cli/tests/php_cli_server.inc required but not found";
+}
+?>
+--FILE--
+<?php
+
+include __DIR__ . "/../../../../sapi/cli/tests/php_cli_server.inc";
+
+$args = ["-d", "extension_dir=" . ini_get("extension_dir"), "-d", "extension=" . (substr(PHP_OS, 0, 3) == "WIN" ? "php_" : "") . "soap." . PHP_SHLIB_SUFFIX];
+if (php_ini_loaded_file()) {
+    $args[] = "-c";
+    $args[] = php_ini_loaded_file();
+}
+
+// A 10-char name makes the wrong offset land exactly on the value "path=/evil",
+// falsely matching it as a path attribute.
+$code = <<<'PHP'
+header("Content-Type: text/xml");
+header("Set-Cookie: sessionkey=path=/evil;domain=good.com");
+echo <<<XML
+<?xml version="1.0" encoding="UTF-8"?>
+<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns1="test-uri">
+  <SOAP-ENV:Body>
+    <ns1:testResponse/>
+  </SOAP-ENV:Body>
+</SOAP-ENV:Envelope>
+XML;
+PHP;
+
+php_cli_server_start($code, null, $args);
+
+$client = new SoapClient(null, [
+    'location' => 'http://' . PHP_CLI_SERVER_ADDRESS . '/test/endpoint',
+    'uri' => 'test-uri',
+    'trace' => true,
+]);
+
+try {
+    $client->__soapCall("test", []);
+} catch (SoapFault $e) {
+    // Response parsing may fault, cookies are still stored
+}
+
+$cookies = $client->__getCookies();
+
+// path should default to "/test" from the request URI, not "/evil" from the value.
+echo "value: " . $cookies['sessionkey'][0] . "\n";
+echo "path: " . $cookies['sessionkey'][1] . "\n";
+echo "domain: " . $cookies['sessionkey'][2] . "\n";
+?>
+--EXPECT--
+value: path=/evil
+path: /test
+domain: good.com