as discussed on internals, enable phar by default for testing purposes.

Phar is enabled as a shared extension by default in order to allow zlib/bz2 to be built shared.  If phar is statically built,
both zlib and bz2 must be statically built in order for phar to use them, so default compile as shared is much more flexible

ext/phar/config.m4

@@ -2,7 +2,7 @@ dnl $Id$
 dnl config.m4 for extension phar
 
 PHP_ARG_ENABLE(phar, for phar archive support,
-[  --enable-phar           Enable phar support])
+[  --disable-phar           Disable phar support], shared)
 
 if test "$PHP_PHAR" != "no"; then
   PHP_NEW_EXTENSION(phar, util.c tar.c zip.c stream.c func_interceptors.c dirstream.c phar.c phar_object.c phar_path_check.c, $ext_shared)

ext/phar/config.w32

@@ -1,7 +1,7 @@
 // $Id$
 // vim:ft=javascript
 
-ARG_ENABLE("phar", "enable phar support", "no");
+ARG_ENABLE("phar", "disable phar support", "shared");
 
 if (PHP_PHAR != "no") {
 	EXTENSION("phar", "dirstream.c func_interceptors.c phar.c phar_object.c phar_path_check.c stream.c tar.c util.c zip.c");