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in_array Checks if a value exists in an array interface_exists Checks if the interface has been defined is_a Returns TRUE if the object is of this class or has this class as one of its parents is_subclass_of Returns TRUE if the object has this class as one of its parents idate Format a local time/date as integer is_dir Tells whether the filename is a directory is_executable Tells whether the filename is executable is_file Tells whether the filename is a regular file is_link Tells whether the filename is a symbolic link is_readable Tells whether the filename is readable is_uploaded_file Tells whether the file was uploaded via HTTP POST is_writable Tells whether the filename is writable is_writeable Alias of is_writable() ibase_add_user Add a user to a security database (only for IB6 or later) ibase_affected_rows Return the number of rows that were affected by the previous query ibase_backup Initiates a backup task in the service manager and returns immediately ibase_blob_add Add data into a newly created blob ibase_blob_cancel Cancel creating blob ibase_blob_close Close blob ibase_blob_create Create a new blob for adding data ibase_blob_echo Output blob contents to browser ibase_blob_get Get len bytes data from open blob ibase_blob_import Create blob, copy file in it, and close it ibase_blob_info Return blob length and other useful info ibase_blob_open Open blob for retrieving data parts ibase_close Close a connection to an InterBase database ibase_commit_ret Commit a transaction without closing it ibase_commit Commit a transaction ibase_connect Open a connection to an InterBase database ibase_db_info Request statistics about a database ibase_delete_user Delete a user from a security database (only for IB6 or later) ibase_drop_db Drops a database ibase_errcode Return an error code ibase_errmsg Return error messages ibase_execute Execute a previously prepared query ibase_fetch_assoc Fetch a result row from a query as an associative array ibase_fetch_object Get an object from a InterBase database ibase_fetch_row Fetch a row from an InterBase database ibase_field_info Get information about a field ibase_free_event_handler Cancels a registered event handler ibase_free_query Free memory allocated by a prepared query ibase_free_result Free a result set ibase_gen_id Increments the named generator and returns its new value ibase_maintain_db Execute a maintenance command on the database server ibase_modify_user Modify a user to a security database (only for IB6 or later) ibase_name_result Assigns a name to a result set ibase_num_fields Get the number of fields in a result set ibase_num_params Return the number of parameters in a prepared query ibase_param_info Return information about a parameter in a prepared query ibase_pconnect Open a persistent connection to an InterBase database ibase_prepare Prepare a query for later binding of parameter placeholders and execution ibase_query Execute a query on an InterBase database ibase_restore Initiates a restore task in the service manager and returns immediately ibase_rollback_ret Roll back a transaction without closing it ibase_rollback Roll back a transaction ibase_server_info Request information about a database server ibase_service_attach Connect to the service manager ibase_service_detach Disconnect from the service manager ibase_set_event_handler Register a callback function to be called when events are posted ibase_timefmt Sets the format of timestamp, date and time type columns returned from queries ibase_trans Begin a transaction ibase_wait_event Wait for an event to be posted by the database icap_close Close an ICAP stream icap_create_calendar Create a new calendar icap_delete_calendar Delete a calendar icap_delete_event Delete an event from an ICAP calendar icap_fetch_event Fetches an event from the calendar stream/ icap_list_alarms Return a list of events that has an alarm triggered at the given datetime icap_list_events Return a list of events between two given datetimes icap_open Opens up an ICAP connection icap_rename_calendar Rename a calendar icap_reopen Reopen ICAP stream to new calendar icap_snooze Snooze an alarm icap_store_event Store an event into an ICAP calendar iconv_get_encoding Retrieve internal configuration variables of iconv extension iconv_mime_decode_headers Decodes multiple MIME header fields at once iconv_mime_decode Decodes a MIME header field iconv_mime_encode Composes a MIME header field iconv_set_encoding Set current setting for character encoding conversion iconv_strlen Returns the character count of string iconv_strpos Finds position of first occurrence of a needle within a haystack iconv_strrpos Finds the last occurrence of a needle within the specified range of haystack iconv_substr Cut out part of a string iconv Convert string to requested character encoding id3_get_frame_long_name Get the long name of an ID3v2 frame id3_get_frame_short_name Get the short name of an ID3v2 frame id3_get_genre_id Get the id for a genre id3_get_genre_list Get all possible genre values id3_get_genre_name Get the name for a genre id id3_get_tag Get all information stored in an ID3 tag id3_get_version Get version of an ID3 tag id3_remove_tag Remove an existing ID3 tag id3_set_tag Update information stored in an ID3 tag iis_add_server Creates a new virtual web server iis_get_dir_security Gets Directory Security iis_get_script_map Gets script mapping on a virtual directory for a specific extension iis_get_server_by_comment Return the instance number associated with the Comment iis_get_server_by_path Return the instance number associated with the Path iis_get_server_rights Gets server rights iis_get_service_state Returns the state for the service defined by ServiceId iis_remove_server Removes the virtual web server indicated by ServerInstance iis_set_app_settings Creates application scope for a virtual directory iis_set_dir_security Sets Directory Security iis_set_script_map Sets script mapping on a virtual directory iis_set_server_rights Sets server rights iis_start_server Starts the virtual web server iis_start_service Starts the service defined by ServiceId iis_stop_server Stops the virtual web server iis_stop_service Stops the service defined by ServiceId image_type_to_extension Get file extension for image type image_type_to_mime_type Get Mime-Type for image-type returned by getimagesize, exif_read_data, exif_thumbnail, exif_imagetype image2wbmp Output image to browser or file imagealphablending Set the blending mode for an image imageantialias Should antialias functions be used or not imagearc Draw a partial ellipse imagechar Draw a character horizontally imagecharup Draw a character vertically imagecolorallocate Allocate a color for an image imagecolorallocatealpha Allocate a color for an image imagecolorat Get the index of the color of a pixel imagecolorclosest Get the index of the closest color to the specified color imagecolorclosestalpha Get the index of the closest color to the specified color + alpha imagecolorclosesthwb Get the index of the color which has the hue, white and blackness nearest to the given color imagecolordeallocate De-allocate a color for an image imagecolorexact Get the index of the specified color imagecolorexactalpha Get the index of the specified color + alpha imagecolormatch Makes the colors of the palette version of an image more closely match the true color version imagecolorresolve Get the index of the specified color or its closest possible alternative imagecolorresolvealpha Get the index of the specified color + alpha or its closest possible alternative imagecolorset Set the color for the specified palette index imagecolorsforindex Get the colors for an index imagecolorstotal Find out the number of colors in an image's palette imagecolortransparent Define a color as transparent imageconvolution Apply a 3x3 convolution matrix, using coefficient div and offset imagecopy Copy part of an image imagecopymerge Copy and merge part of an image imagecopymergegray Copy and merge part of an image with gray scale imagecopyresampled Copy and resize part of an image with resampling imagecopyresized Copy and resize part of an image imagecreate Create a new palette based image imagecreatefromgd2 Create a new image from GD2 file or URL imagecreatefromgd2part Create a new image from a given part of GD2 file or URL imagecreatefromgd Create a new image from GD file or URL imagecreatefromgif Create a new image from file or URL imagecreatefromjpeg Create a new image from file or URL imagecreatefrompng Create a new image from file or URL imagecreatefromstring Create a new image from the image stream in the string imagecreatefromwbmp Create a new image from file or URL imagecreatefromxbm Create a new image from file or URL imagecreatefromxpm Create a new image from file or URL imagecreatetruecolor Create a new true color image imagedashedline Draw a dashed line imagedestroy Destroy an image imageellipse Draw an ellipse imagefill Flood fill imagefilledarc Draw a partial ellipse and fill it imagefilledellipse Draw a filled ellipse imagefilledpolygon Draw a filled polygon imagefilledrectangle Draw a filled rectangle imagefilltoborder Flood fill to specific color imagefilter Applies a filter to an image imagefontheight Get font height imagefontwidth Get font width imageftbbox Give the bounding box of a text using fonts via freetype2 imagefttext Write text to the image using fonts using FreeType 2 imagegammacorrect Apply a gamma correction to a GD image imagegd2 Output GD2 image to browser or file imagegd Output GD image to browser or file imagegif Output image to browser or file imageinterlace Enable or disable interlace imageistruecolor Finds whether an image is a truecolor image imagejpeg Output image to browser or file imagelayereffect Set the alpha blending flag to use the bundled libgd layering effects imageline Draw a line imageloadfont Load a new font imagepalettecopy Copy the palette from one image to another imagepng Output a PNG image to either the browser or a file imagepolygon Draw a polygon imagepsbbox Give the bounding box of a text rectangle using PostScript Type1 fonts imagepscopyfont Make a copy of an already loaded font for further modification imagepsencodefont Change the character encoding vector of a font imagepsextendfont Extend or condense a font imagepsfreefont Free memory used by a PostScript Type 1 font imagepsloadfont Load a PostScript Type 1 font from file imagepsslantfont Slant a font imagepstext To draw a text string over an image using PostScript Type1 fonts imagerectangle Draw a rectangle imagerotate Rotate an image with a given angle imagesavealpha Set the flag to save full alpha channel information (as opposed to single-color transparency) when saving PNG images imagesetbrush Set the brush image for line drawing imagesetpixel Set a single pixel imagesetstyle Set the style for line drawing imagesetthickness Set the thickness for line drawing imagesettile Set the tile image for filling imagestring Draw a string horizontally imagestringup Draw a string vertically imagesx Get image width imagesy Get image height imagetruecolortopalette Convert a true color image to a palette image imagettfbbox Give the bounding box of a text using TrueType fonts imagettftext Write text to the image using TrueType fonts imagetypes Return the image types supported by this PHP build imagewbmp Output image to browser or file imagexbm Output XBM image to browser or file iptcembed Embed binary IPTC data into a JPEG image iptcparse Parse a binary IPTC http://www.iptc.org/ block into single tags. imap_8bit Convert an 8bit string to a quoted-printable string imap_alerts This function returns all IMAP alert messages (if any) that have occurred during this page request or since the alert stack was reset imap_append Append a string message to a specified mailbox imap_base64 Decode BASE64 encoded text imap_binary Convert an 8bit string to a base64 string imap_body Read the message body imap_bodystruct Read the structure of a specified body section of a specific message imap_check Check current mailbox imap_clearflag_full Clears flags on messages imap_close Close an IMAP stream imap_createmailbox Create a new mailbox imap_delete Mark a message for deletion from current mailbox imap_deletemailbox Delete a mailbox imap_errors This function returns all of the IMAP errors (if any) that have occurred during this page request or since the error stack was reset imap_expunge Delete all messages marked for deletion imap_fetch_overview Read an overview of the information in the headers of the given message imap_fetchbody Fetch a particular section of the body of the message imap_fetchheader Returns header for a message imap_fetchstructure Read the structure of a particular message imap_get_quota Retrieve the quota level settings, and usage statics per mailbox imap_get_quotaroot Retrieve the quota settings per user imap_getacl Gets the ACL for a given mailbox imap_getmailboxes Read the list of mailboxes, returning detailed information on each one imap_getsubscribed List all the subscribed mailboxes imap_header Alias of imap_headerinfo() imap_headerinfo Read the header of the message imap_headers Returns headers for all messages in a mailbox imap_last_error This function returns the last IMAP error (if any) that occurred during this page request imap_list Read the list of mailboxes imap_listmailbox Alias of imap_list() imap_listscan Read the list of mailboxes, takes a string to search for in the text of the mailbox imap_listsubscribed Alias of imap_lsub() imap_lsub List all the subscribed mailboxes imap_mail_compose Create a MIME message based on given envelope and body sections imap_mail_copy Copy specified messages to a mailbox imap_mail_move Move specified messages to a mailbox imap_mail Send an email message imap_mailboxmsginfo Get information about the current mailbox imap_mime_header_decode Decode MIME header elements imap_msgno This function returns the message sequence number for the given UID imap_num_msg Gives the number of messages in the current mailbox imap_num_recent Gives the number of recent messages in current mailbox imap_open Open an IMAP stream to a mailbox imap_ping Check if the IMAP stream is still active imap_qprint Convert a quoted-printable string to an 8 bit string imap_renamemailbox Rename an old mailbox to new mailbox imap_reopen Reopen IMAP stream to new mailbox imap_rfc822_parse_adrlist Parses an address string imap_rfc822_parse_headers Parse mail headers from a string imap_rfc822_write_address Returns a properly formatted email address given the mailbox, host, and personal info imap_scanmailbox Alias of imap_listscan() imap_search This function returns an array of messages matching the given search criteria imap_set_quota Sets a quota for a given mailbox imap_setacl Sets the ACL for a giving mailbox imap_setflag_full Sets flags on messages imap_sort Sort an array of message headers imap_status This function returns status information on a mailbox other than the current one imap_subscribe Subscribe to a mailbox imap_thread Returns a tree of threaded message imap_timeout Set or fetch imap timeout imap_uid This function returns the UID for the given message sequence number imap_undelete Unmark the message which is marked deleted imap_unsubscribe Unsubscribe from a mailbox imap_utf7_decode Decodes a modified UTF-7 encoded string imap_utf7_encode Converts ISO-8859-1 string to modified UTF-7 text imap_utf8 Converts MIME-encoded text to UTF-8 ifx_affected_rows Get number of rows affected by a query ifx_blobinfile_mode Set the default blob mode for all select queries ifx_byteasvarchar Set the default byte mode ifx_close Close Informix connection ifx_connect Open Informix server connection ifx_copy_blob Duplicates the given blob object ifx_create_blob Creates an blob object ifx_create_char Creates an char object ifx_do Execute a previously prepared SQL-statement ifx_error Returns error code of last Informix call ifx_errormsg Returns error message of last Informix call ifx_fetch_row Get row as enumerated array ifx_fieldproperties List of SQL fieldproperties ifx_fieldtypes List of Informix SQL fields ifx_free_blob Deletes the blob object ifx_free_char Deletes the char object ifx_free_result Releases resources for the query ifx_get_blob Return the content of a blob object ifx_get_char Return the content of the char object ifx_getsqlca Get the contents of sqlca.sqlerrd[0..5] after a query ifx_htmltbl_result Formats all rows of a query into a HTML table ifx_nullformat Sets the default return value on a fetch row ifx_num_fields Returns the number of columns in the query ifx_num_rows Count the rows already fetched from a query ifx_pconnect Open persistent Informix connection ifx_prepare Prepare an SQL-statement for execution ifx_query Send Informix query ifx_textasvarchar Set the default text mode ifx_update_blob Updates the content of the blob object ifx_update_char Updates the content of the char object ifxus_close_slob Deletes the slob object ifxus_create_slob Creates an slob object and opens it ifxus_free_slob Deletes the slob object ifxus_open_slob Opens an slob object ifxus_read_slob Reads nbytes of the slob object ifxus_seek_slob Sets the current file or seek position ifxus_tell_slob Returns the current file or seek position ifxus_write_slob Writes a string into the slob object ingres_autocommit Switch autocommit on or off ingres_close Close an Ingres II database connection ingres_commit Commit a transaction ingres_connect Open a connection to an Ingres II database ingres_cursor Gets a cursor name for a given link resource ingres_errno Gets the last ingres error number generated ingres_error Gets a meaningful error message for the last error generated ingres_errsqlstate Gets the last SQLSTATE error code generated ingres_fetch_array Fetch a row of result into an array ingres_fetch_object Fetch a row of result into an object ingres_fetch_row Fetch a row of result into an enumerated array ingres_field_length Get the length of a field ingres_field_name Get the name of a field in a query result ingres_field_nullable Test if a field is nullable ingres_field_precision Get the precision of a field ingres_field_scale Get the scale of a field ingres_field_type Get the type of a field in a query result ingres_num_fields Get the number of fields returned by the last query ingres_num_rows Get the number of rows affected or returned by the last query ingres_pconnect Open a persistent connection to an Ingres II database ingres_query Send a SQL query to Ingres II ingres_rollback Roll back a transaction ircg_channel_mode Set channel mode flags for user ircg_disconnect Close connection to server ircg_eval_ecmascript_params Decodes a list of JS-encoded parameters ircg_fetch_error_msg Returns the error from previous IRCG operation ircg_get_username Get username for connection ircg_html_encode Encodes HTML preserving output ircg_ignore_add Add a user to your ignore list on a server ircg_ignore_del Remove a user from your ignore list on a server ircg_invite Invites nickname to channel ircg_is_conn_alive Check connection status ircg_join Join a channel on a connected server ircg_kick Kick a user out of a channel on server ircg_list List topic/user count of channel(s) ircg_lookup_format_messages Check for the existence of a format message set ircg_lusers IRC network statistics ircg_msg Send message to channel or user on server ircg_names Query visible usernames ircg_nick Change nickname on server ircg_nickname_escape Encode special characters in nickname to be IRC-compliant ircg_nickname_unescape Decodes encoded nickname ircg_notice Send a notice to a user on server ircg_oper Elevates privileges to IRC OPER ircg_part Leave a channel on server ircg_pconnect Connect to an IRC server ircg_register_format_messages Register a format message set ircg_set_current Set current connection for output ircg_set_file Set logfile for connection ircg_set_on_die Set action to be executed when connection dies ircg_topic Set topic for channel on server ircg_who Queries server for WHO information ircg_whois Query server for user information is_finite Finds whether a value is a legal finite number is_infinite Finds whether a value is infinite is_nan Finds whether a value is not a number ignore_user_abort Set whether a client disconnect should abort script execution inet_ntop Converts a packed internet address to a human readable representation inet_pton Converts a human readable IP address to its packed in_addr representation ip2long Converts a string containing an (IPv4) Internet Protocol dotted address into a proper address ini_alter Alias of ini_set() ini_get_all Gets all configuration options ini_get Gets the value of a configuration option ini_restore Restores the value of a configuration option ini_set Sets the value of a configuration option is_soap_fault Checks if SOAP call was failed iterator_count Count the elements in an iterator iterator_to_array Copy the iterator into an array implode Join array elements with a string i18n_loc_get_default Get the default Locale i18n_loc_set_default Set the default Locale import_request_variables Import GET/POST/Cookie variables into the global scope intval Get the integer value of a variable is_array Finds whether a variable is an array is_bool Finds out whether a variable is a boolean is_callable Verify that the contents of a variable can be called as a function is_double Alias of is_float() is_float Finds whether a variable is a float is_int Find whether a variable is an integer is_integer Alias of is_int() is_long Alias of is_int() is_null Finds whether a variable is NULL is_numeric Finds whether a variable is a number or a numeric string is_object Finds whether a variable is an object is_real Alias of is_float() is_resource Finds whether a variable is a resource is_scalar Finds whether a variable is a scalar is_string Finds whether a variable is a string isset Determine whether a variable is set