appveyor: use x64 PHP

Author: dg

appveyor.yml

@@ -21,7 +21,7 @@ install:
     # Install PHP
     - IF EXIST c:\php (SET PHP=0) ELSE (mkdir c:\php)
     - IF %PHP%==1 cd c:\php
-    - IF %PHP%==1 curl https://windows.php.net/downloads/releases/archives/php-7.1.0-Win32-VC14-x64.zip --output php.zip
+    - IF %PHP%==1 curl https://windows.php.net/downloads/releases/archives/php-7.1.5-Win32-VC14-x64.zip --output php.zip
     - IF %PHP%==1 7z x php.zip >nul
     - IF %PHP%==1 echo extension_dir=ext >> php.ini
     - IF %PHP%==1 echo extension=php_openssl.dll >> php.ini