Fix bug #61525: SOAP functions require at least one space after HTTP header colon

HTTP/1.1 does not require a single whitespace after the colon, and
SoapServer does implement HTTP/1.1. The header value is already correctly
whitespace-trimmed, so no behaviour change happens w.r.t. header values.

Closes GH-15793.

NEWS

@@ -49,6 +49,10 @@ PHP                                                                        NEWS
   . Fixed bug GH-15718 (Segfault on ReflectionProperty::get{Hook,Hooks}() on
     dynamic properties). (DanielEScherzer)
 
+- SOAP:
+  . Fixed bug #61525 (SOAP functions require at least one space after HTTP
+    header colon). (nielsdos)
+
 - Standard:
   . Fixed bug GH-15552 (Signed integer overflow in ext/standard/scanf.c). (cmb)
   . Implemented GH-15685 (improve proc_open error reporting on Windows). (cmb)

ext/soap/tests/bugs/bug61525.phpt

@@ -0,0 +1,33 @@
+--TEST--
+Bug #61525 (SOAP functions require at least one space after HTTP header colon)
+--EXTENSIONS--
+soap
+--SKIPIF--
+<?php
+if (@!include __DIR__."/../../../standard/tests/http/server.inc") die('skip server.inc not available');
+http_server_skipif();
+?>
+--FILE--
+<?php
+require __DIR__."/../../../standard/tests/http/server.inc";
+
+$response = <<<XML
+<?xml version="1.0" encoding="UTF-8"?>
+<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns1="http://testuri.org" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">
+    <SOAP-ENV:Body>
+        <ns1:AddResponse>
+            <return xsi:type="xsd:int">7</return>
+        </ns1:AddResponse>
+    </SOAP-ENV:Body>
+</SOAP-ENV:Envelope>
+XML;
+
+$length = strlen($response);
+$server_response = "data://text/xml;base64," . base64_encode("HTTP/1.1 200 OK\r\nConnection:close\r\nContent-Length:$length\r\n\r\n$response");
+['pid' => $pid, 'uri' => $uri] = http_server([$server_response]);
+$client = new SoapClient(NULL, ['location' => $uri, 'uri' => $uri]);
+var_dump($client->Add(3, 4));
+http_server_kill($pid);
+?>
+--EXPECT--
+int(7)