17101. is_valid_id
17102. is_valid_plugin_name
17103. is_valid_url
17104. is_valid_user_name
17105. is_validaliasname
17106. is_viewing
17107. is_voided_display
17108. is_wc_endpoint_url
17109. is_web_crawler
17110. is_webgui_cert
17111. is_weixin
17112. is_windows
17113. is_woocommerce
17114. is_woocommerce_activated
17115. is_woocommerce_active
17116. is_wp_error
17117. is_writable
17118. is_writable_windows
17119. is_writeable
17120. is_year
17121. isa
17122. isadmin
17123. isadminloggedin
17124. isanyadmin
17125. isb
17126. isblacklist
17127. isc_chmod
17128. isc_date
17129. isc_gmmktime
17130. isc_html_escape
17131. isc_json_encode
17132. isc_strlen
17133. isc_strpos
17134. isc_strtolower
17135. isc_strtoupper
17136. isc_substr
17137. isclanmember
17138. isediting
17139. isemail
17140. isempty
17141. iserializer
17142. isetcookie
17143. isfile
17144. isfounder
17145. isfun
17146. isfun1
17147. isguest
17148. isguestuser
17149. isid
17150. isimplexml_load_string
17151. isloggedin
17152. islogin
17153. ismember
17154. ismobile
17155. ismoving
17156. isnull
17157. isnum
17158. iso8601_decode
17159. iso8601_timezone_to_offset
17160. iso8601_to_datetime
17161. isonlybody
17162. isort
17163. ispageadmin
17164. ispluginkey
17165. ispos
17166. issetModule
17167. isset_request_var
17168. issetor
17169. isteacher
17170. isteacheredit
17171. isteacherinanycourse
17172. istripslashes
17173. istrlen
17174. isvalidpid
17175. iswhitelist
17176. it
17177. it_classes_load
17178. item
17179. itemName
17180. item_description
17181. item_image
17182. item_message_id
17183. item_new_uri
17184. item_normal
17185. item_permissions_sql
17186. item_photo_menu
17187. item_popup
17188. item_post
17189. item_prevnext_links
17190. item_remove
17191. item_store
17192. item_store_update
17193. item_type2str
17194. iteminfo2
17195. items
17196. itemurl
17197. iterFirst
17198. iterator_apply
17199. iterator_count
17200. iterator_to_array