Google App Engine for PHP で有効になっている extension の list

gistfile1.txt

```
Array
(
    [0] => Core
    [1] => date
    [2] => ereg
    [3] => libxml
    [4] => openssl
    [5] => pcre
    [6] => zlib
    [7] => apcu
    [8] => bcmath
    [9] => calendar
    [10] => ctype
    [11] => dom
    [12] => hash
    [13] => filter
    [14] => ftp
    [15] => gd
    [16] => SPL
    [17] => iconv
    [18] => json
    [19] => mailparse
    [20] => mbstring
    [21] => mcrypt
    [22] => session
    [23] => standard
    [24] => mysqlnd
    [25] => OAuth
    [26] => Zend OPcache
    [27] => mysqli
    [28] => PDO
    [29] => pdo_mysql
    [30] => Reflection
    [31] => mysql
    [32] => shmop
    [33] => SimpleXML
    [34] => soap
    [35] => sockets
    [36] => exif
    [37] => tokenizer
    [38] => xml
    [39] => xmlreader
    [40] => xmlwriter
    [41] => xsl
    [42] => zip
    [43] => curl
    [44] => google_cloud_sql_mysqlnd_plugin
    [45] => GAE Runtime Module
    [46] => apc
    [47] => memcache
    [48] => memcached
    [49] => urlfetch_stream_wrapper_plugin
)
```