title: Homebrew command to update PHP : Error: No available formula for php56
body: <p>I am trying to update PHP on my Mac OS X machine using Homebrew, and I am receiving the following output:</p>
  
  <pre><code>*********:Library *********$ brew install php56
  Error: No available formula for php56 
  ==&gt; Searching formulae...
  ==&gt; Searching taps...
  homebrew/php/php56-amqp         homebrew/php/php56-phalcon
  homebrew/php/php56-apcu         homebrew/php/php56-pimple
  homebrew/php/php56-augmentedtypes   homebrew/php/php56-proctitle
  homebrew/php/php56-binpack      homebrew/php/php56-propro
  homebrew/php/php56-blitz        homebrew/php/php56-protobuf
  homebrew/php/php56-boxwood      homebrew/php/php56-pspell
  homebrew/php/php56-chdb         homebrew/php/php56-pthreads
  homebrew/php/php56-couchbase        homebrew/php/php56-qr
  homebrew/php/php56-crypto       homebrew/php/php56-raphf
  homebrew/php/php56-dbase        homebrew/php/php56-redis
  homebrew/php/php56-dbus         homebrew/php/php56-redland
  homebrew/php/php56-dmtx         homebrew/php/php56-riak
  homebrew/php/php56-eio          homebrew/php/php56-runkit
  homebrew/php/php56-ev           homebrew/php/php56-scrypt
  homebrew/php/php56-event        homebrew/php/php56-snappy
  homebrew/php/php56-fast_assert      homebrew/php/php56-snmp
  homebrew/php/php56-gearman      homebrew/php/php56-sodium
  homebrew/php/php56-geoip        homebrew/php/php56-solr
  homebrew/php/php56-gmagick      homebrew/php/php56-sphinx
  homebrew/php/php56-gmp          homebrew/php/php56-spl-types
  homebrew/php/php56-graphdat     homebrew/php/php56-ssh2
  homebrew/php/php56-grpc         homebrew/php/php56-stats
  homebrew/php/php56-hprose       homebrew/php/php56-stemmer
  homebrew/php/php56-htscanner        homebrew/php/php56-suhosin
  homebrew/php/php56-http         homebrew/php/php56-sundown
  homebrew/php/php56-igbinary     homebrew/php/php56-svm
  homebrew/php/php56-imagick      homebrew/php/php56-swoole
  homebrew/php/php56-inclued      homebrew/php/php56-symfony-debug
  homebrew/php/php56-intl         homebrew/php/php56-thrift
  homebrew/php/php56-ioncubeloader    homebrew/php/php56-tidy
  homebrew/php/php56-jsmin        homebrew/php/php56-timezonedb
  homebrew/php/php56-judy         homebrew/php/php56-tokyotyrant
  homebrew/php/php56-leveldb      homebrew/php/php56-twig
  homebrew/php/php56-libevent     homebrew/php/php56-uopz
  homebrew/php/php56-libsodium        homebrew/php/php56-uploadprogress
  homebrew/php/php56-libvirt      homebrew/php/php56-uuid
  homebrew/php/php56-lz4          homebrew/php/php56-varnish
  homebrew/php/php56-lzf          homebrew/php/php56-vld
  homebrew/php/php56-magickwand       homebrew/php/php56-wbxml
  homebrew/php/php56-mailparse        homebrew/php/php56-xcache
  homebrew/php/php56-mcrypt       homebrew/php/php56-xdebug
  homebrew/php/php56-mecab        homebrew/php/php56-xhgui
  homebrew/php/php56-memcache     homebrew/php/php56-xhp
  homebrew/php/php56-memcached        homebrew/php/php56-xhprof
  homebrew/php/php56-midgard2     homebrew/php/php56-xmldiff
  homebrew/php/php56-mongo        homebrew/php/php56-xxtea
  homebrew/php/php56-mosquitto        homebrew/php/php56-yac
  homebrew/php/php56-msgpack      homebrew/php/php56-yaf
  homebrew/php/php56-mustache     homebrew/php/php56-yaml
  homebrew/php/php56-mysqlnd_ms       homebrew/php/php56-yar
  homebrew/php/php56-oauth        homebrew/php/php56-yaz
  homebrew/php/php56-opcache      homebrew/php/php56-yp
  homebrew/php/php56-parsekit     homebrew/php/php56-yrmcds
  homebrew/php/php56-pcntl        homebrew/php/php56-zmq
  homebrew/php/php56-pdflib       homebrew/php/php56-zookeeper
  homebrew/php/php56-pdo-dblib        homebrew/php/php56
  homebrew/php/php56-pdo-pgsql
  </code></pre>
  
  <p>What is going wrong?</p>