check loaded extensions php

1Array
2(
3    [0] => Core
4    [1] => date
5    [2] => libxml
6    [3] => openssl
7    [4] => pcre
8    [5] => zlib
9    [6] => filter
10    [7] => hash
11    [8] => Reflection
12    [9] => SPL
13    [10] => sodium
14    [11] => session
15    [12] => standard
16    [13] => apache2handler
17    [14] => mysqlnd
18    [15] => PDO
19    [16] => xml
20    [17] => calendar
21    [18] => ctype
22    [19] => curl
23    [20] => dom
24    [21] => mbstring
25    [22] => fileinfo
26    [23] => ftp
27    [24] => gd
28    [25] => gettext
29    [26] => iconv
30    [27] => imagick
31    [28] => imap
32    [29] => intl
33    [30] => json
34    [31] => exif
35    [32] => mysqli
36    [33] => pdo_mysql
37    [34] => Phar
38    [35] => posix
39    [36] => readline
40    [37] => shmop
41    [38] => SimpleXML
42    [39] => soap
43    [40] => sockets
44    [41] => sysvmsg
45    [42] => sysvsem
46    [43] => sysvshm
47    [44] => tokenizer
48    [45] => wddx
49    [46] => xmlreader
50    [47] => xmlrpc
51    [48] => xmlwriter
52    [49] => xsl
53    [50] => zip
54    [51] => Zend OPcache
55)
56