PHP Static analysis for known
Extension
                    Calls
                  ext/standard
                      2243
                  ext/string
                      936
                  ext/file
                      354
                  ext/array
                      290
                  ext/date
                      166
                  ext/pcre
                      110
                  ext/json
                      104
                  ext/dom
                      101
                  ext/curl
                      99
                  ext/math
                      72
                  ext/info
                      70
                  ext/filter
                      58
                  ext/spl
                      48
                  ext/psr
                      41
                  ext/random
                      40
                  ext/pdo
                      29
                  ext/gd
                      26
                  ext/ob
                      21
                  ext/hash
                      20
                  ext/session
                      19
                  ext/mongodb
                      11
                  ext/reflection
                      10
                  ext/openssl
                      7
                  ext/mbstring
                      6
                  ext/libxml
                      6
                  ext/mongo
                      4
                  ext/fileinfo
                      4
                  ext/phar
                      3
                  ext/password
                      3
                  ext/gettext
                      3
                  ext/exif
                      3
                  ext/simplexml
                      2
                  ext/http
                      2
                  ext/ctype
                      1