For a fresh of taste I've installed Mac OS X El Captain(10.11) beta on my Macbook. Everything is fine until I want to upgrade my PHP installation via homebrew.

The result is:

> brew install php56
Warning: You are using OS X 10.11.
We do not provide support for this pre-release version.
You may encounter build failures or other breakage.
==> Installing php56 from homebrew/homebrew-php
==> Downloading https://php.net/get/php-5.6.11.tar.bz2/from/this/mirror
Already downloaded: /Library/Caches/Homebrew/php56-5.6.11
==> ./configure --prefix=/usr/local/Cellar/php56/5.6.11_2 --localstatedir=/usr/local/var --sysconfdir=/usr/local/etc
==> make
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [sapi/cgi/php-cgi] Error 1
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [libs/libphp5.bundle] Error 1

READ THIS: https://git.io/brew-troubleshooting
If reporting this issue please do so at (not Homebrew/homebrew):
  https://github.com/homebrew/homebrew-php/issues

Warning: You are using OS X 10.11.
We do not provide support for this pre-release version.
You may encounter build failures or other breakage.

According to the warning, that is not avoidable with build failure. ;-)

BUT, the problem can be solved with the power of google. :)

---

Open the File /usr/local/Library/Taps/homebrew/homebrew-php/Abstract/abstract-php.rb line 362, replace:
s.change_make_var! "EXTRA_LIBS", "\\1 -lstdc++"
to
s.change_make_var! "EXTRA_LIBS", "\\1 -lstdc++ /usr/local/opt/openssl/lib/libssl.dylib /usr/local/opt/openssl/lib/libcrypto.dylib"

then try to install the php via homebrew again.

via: https://github.com/Homebrew/homebrew-php/issues/1941