title: The json extension is missing. Please check your PHP configuration
body: <p>I install PHP5.6.0 on Ubuntu 13.10 x64 from this </p>
  
  <pre><code>https://launchpad.net/~ondrej/+archive/php5-5.6a
  </code></pre>
  
  <p>then I installed phpmyadmin when I am trying to lunch phpmyadmin I got this message </p>
  
  <pre><code>The json extension is missing. Please check your PHP configuration.
  </code></pre>
  
  <p>my PHP modules:</p>
  
  <pre><code>bcmath
  bz2
  calendar
  Core
  ctype
  date
  dba
  dom
  ereg
  exif
  fileinfo
  filter
  ftp
  gd
  gettext
  hash
  iconv
  libxml
  mbstring
  mcrypt
  mhash
  mysql
  mysqli
  openssl
  pcntl
  pcre
  PDO
  pdo_mysql
  Phar
  posix
  readline
  Reflection
  session
  shmop
  SimpleXML
  soap
  sockets
  SPL
  standard
  sysvmsg
  sysvsem
  sysvshm
  tokenizer
  wddx
  xml
  xmlreader
  xmlwriter
  Zend OPcache
  zip
  zlib
  </code></pre>
  
  <p>[Zend Modules]
     Zend OPcache</p>
  
  <p>then when i use this command to install <code>php-json</code> </p>
  
  <pre><code>sudo apt-get install php5-json
  </code></pre>
  
  <p>I got this</p>
  
  <pre><code>The following packages have unmet dependencies:
  php5-json : Depends: phpapi-20121212
  E: Unable to correct problems, you have held broken packages.
  </code></pre>
  
  <p>How can I fix this problem? </p>