Abs: Obtain the absolute value. Acos: returns the arc cosine. Ada_afetch: gets the returned column of the database. Ada_autocommit: Enables or disables automatic modification. Ada_close: Close the Adabas D link. Ada_commit: modifies the Adabas D database. Ada_connect: Link to the Adabas D database. Ada_exec: executes SQL commands. Ada_fetchrow: returns a column. Ada_fieldname: obtains the field name. Ada_fieldtype: obtains the field data type. Ada_freeresult: memory for returning data. Ada_numfields: obtains the number of fields. Ada_numrows: gets the number of returned columns. Ada_result: Get the returned information. Ada_resultall: returns HTML table data. Ada_rollback: undo the current transaction. AddSlashes: adds a slash to the string. Apache_lookup_uri: obtains information about all Uris. Apache_note: Obtain and configure the apache server request records. Array: Creates a new array. Array_walk: enables user-defined functions to process every element in the array. Arsort: sorts the array values from large to small. Asin: returns the arc sine. Asort: sorts the array values from small to large. Aspell_check: Check a single word. Aspell_check-raw: Check for a single word without changing or correcting it even if the spelling is wrong. Aspell_new: load a new dictionary. Aspell_suggest: checks a single word and provides spelling suggestions. Atan: Get the arc tangent value. Atan2: Calculate the arc tangent value of the second number. Base64_decode: decodes a BASE64 encoded string. Base64_encode: base64-encoded string. Basename: returns a file string without a path. Base_convert: Convert the carry mode of numbers. Bcadd: Add two high-precision numbers. Bccomp: Compares two high-precision numbers. Bcdiv: Division of two high-precision numbers. Bcmod: Obtain the remainder of a high-precision number. Bcmul: multiply two high-precision numbers. Bcpow: Calculate the power of a high-precision number. Bcscale: the default number of decimal places for all BC function libraries in the configuration program. Bcsqrt: calculates the square root of a precise number. Bcsub: Subtract two high-precision numbers. Bin2hex: Binary to hexadecimal. BinDec: Binary to decimal. Ceil: calculates the smallest integer greater than the specified number. Chdir: Change the directory. Checkdate: Verify that the date is correct. Checkdnsrr: Check the DNS records of the specified website. Chgrp: Change the group to which the file belongs. Chmod: changes the attributes of a file. Chop: removes consecutive gaps. Chown: Change the owner of a file. Chr: returns the character of the ordinal value. Chunk_split: Splits a string into segments. Clearstatcache: clears the File status cache. Closedir: Close the directory handle. Closelog: Shut Down System records. Connection_aborted: returns true if the link is interrupted. Connection_status: gets the connection status. Connection_timeout: returns true if the PHP program execution time is exceeded. Convert_cyr_string: Convert the ancient Slavic string to another string. Copy: copy an object. Cos: returns the cosine. Count: calculates the number of elements in a variable or array. Crypt: encrypt the string with DES encoding. Current: returns the current element in the array. Date: format the server time. Dbase_add_record: add data to the dBase table. Dbase_close: Close the dBase data table. Dbase_create: Create a dBase data table. Dbase_delete_record: Delete the data in the dBase data table. Dbase_get_record: obtain the data in the dBase data table. Dbase_numfields: obtains the number of fields in the dBase data table. Dbase_numrecords: gets the number of columns in the dBase data table. Dbase_open: Open the dBase data table. Dbase_pack: Clear the dBase data table. Dba_close: closes the database. Dba_delete: Delete the specified data. Dba_exists: Check whether the key exists. Dba_fetch: retrieves the specified data. Dba_firstkey: retrieves the first key value. Dba_insert: add data. Dba_nextkey: retrieves the next key value. Dba_open: Open the database link. Dba_optimize: optimized database. Dba_popen: open and maintain the database link. Dba_replace: modifies or adds data. Dba_sync: Synchronize databases. Dblist: obtains DBM information. Dbmclose: Shut down the DBM database. Dbmdelete: delete specified data. Dbmexists: Check whether the key exists. Dbmfetch: retrieves the specified data. Dbmfirstkey: retrieve the first key name. Dbminsert: Add materials. Dbmnextkey: retrieves the next key value. Dbmopen: Open the DBM database link. Dbmreplace: modifies or adds data. Debugger_off: Disable the built-in PHP debugger. Debugger_on: Use the built-in PHP debugger. DecBin: decimal to binary. DecHex: decimal to hexadecimal. DecOct: decimal to octal. Delete: useless project. Die: output information and interrupt the PHP program. Dir: Directory category. Dirname: Get the directory name in the path. Diskfreespace: Obtain the available space of the directory. Dl: load the PHP extension module. Doubleval: convert a variable to a Double Floating Point. Each: returns the index and value of the next element in the array. Easter_date: Calculate the Easter date. Easter_days: calculates the number of days between Easter and January 1, lunar March 21. Echo: Output string. Empty: determines whether the variable is configured. End: points the internal pointer of the array to the final element. Ereg: String comparison parsing. Eregi: Compares and parses strings, and is case-insensitive. Eregi_replace: parses and replaces strings, regardless of case. Ereg_replace: parses and replaces string comparison. Error_log: sends an error message. Error_reporting: the level of returned error information. Escapeshellcmd: removes special characters from the string. Eval: place the value in the string. Exec: Execute an external program. Exit: end the PHP program. Exp: The power of natural logarithm e. Explode: Cut string. Extract: imports an array to the symbol table. Fclose: Close opened files. FDF_close: Close the FDF file. FDF_create: Create a New FDF file. FDF_get_file: gets the/F key value. FDF_get_status: gets the value of the/STATUS key. FDF_get_value: obtains the field value. FDF_next_field_name: name of the next field. FDF_open: Open the FDF file. FDF_save: saves the FDF file to a file. FDF_set_ap: configure the display field. FDF_set_file: configure the/F key. FDF_set_status: Specifies the configuration/STATUS key. FDF_set_value: the value of the configuration field. Feof: indicates whether the file pointer is at the end of the file. Fgetc: Get the character referred to by the file pointer. Fgetcsv: retrieves the row indicated by the file pointer and parses the CSV field. Fgets: Get the row indicated by the object pointer. Fgetss: gets the row indicated by the file pointer and removes the HTML language mark. File: Read all files into array variables. Fileatime: The last time the file was accessed. Filectime: Get the last file change time. Filegroup: the group to which the file belongs. Fileinode: Get the inode value of the file. Filemtime: The last modification time of the file. Fileowner: obtains the object owner. Fileperms: Get the File Permission configuration. Filepro: Read the FilePro Map file. Filepro_fieldcount: obtains the number of fields. Filepro_fieldname: Obtain the field name. Filepro_fieldtype: obtains the field type. Filepro_fieldwidth: obtains the field width. Filepro_retrieve: Get the data of the specified bucket. Filepro_rowcount: obtains the number of columns. Filesize: get the file size. Filetype: Obtain the file type. File_exists: Check whether the file exists. Flock: Lock a file. Floor: calculates the maximum integer smaller than the specified number. Flush: clears the output buffer. Fopen: open a file or URL. Fpassthru: Output all the remaining data. Fputs: writes the file pointer. Fread: A bit group to read files. FrenchToJD: converts the French Republican calendar into the daily counter of Caesar. Fseek: Move the file pointer. Fsockopen: Open the Socket link of the network. Ftell: Get the position of the file read/write pointer. Ftp_cdup: Return to the upper directory. Ftp_chdir: change the path. Ftp_connect: Open the FTP link. Ftp_delete: delete the file. Ftp_fget: download the file, which exists in the opened file. Ftp_fput: upload an opened file. Ftp_get: download an object. Ftp_login: log on to the FTP server. Ftp_mdtm: Get the last modification time of the specified file. Ftp_mkdir: create a directory. Ftp_nlist: list all files in the specified directory. Ftp_pasv: Switch the active/passive transmission mode. Ftp_put: upload a file. Ftp_pwd: Obtain the current path. Ftp_quit: Disable the FTP connection. Ftp_rawlist: lists all objects in a specified directory in detail. Ftp_rename: Rename the file. Ftp_rmdir: Delete the directory. Ftp_size: Get the size of the specified file. Ftp_0000ype: displays the server system. Function_exists: Check whether the function is defined. Fwrite: writes data to files in binary places. Getallheaders: Get all HTTP variable values. Getdate: Get the time and date information. Getenv: Get the system environment variable gethostbyaddr: return the machine name. Gethostbyname: returns the IP Address URL. Gethostbynamel: returns all IP addresses of machine names. GetImageSize: Get the length and width of the image. Getlastmod: returns the last modification time of the webpage. Getmxrr: Obtain the MX field of the DNS record of the specified website. Getmyinode: return the inode value of the webpage. Getmypid: return the PHP travel code. Getmyuid: returns the PHP user code. Getrandmax: maximum value of a random number. Getrusage: returns the system resource usage. Gettimeofday: Get the current time. Gettype: Get the type of the variable. Get_cmd_var: Get the PHP configuration option value. Get_current_user: get the name of the PHP itinerary owner. Get_magic_quotes_gpc: obtains the value of the PHP environment variable magic_quotes_gpc. Get_magic_quotes_runtime: gets the value of the PHP environment variable magic_quotes_runtime. Get_meta_tags: extracts all metadata marked by meta from the file. Gmdate: Get the current time difference from GMT. Gmmktime: returns the Greenwich Mean Time of UNIX timestamps. GregorianToJD: converts the Gregorian calendar into the daily counter of Caesar. Gzclose: Close the compressed file. Gzeof: determines whether the file is at the end of the compressed file. Gzfile: Read the compressed file to the array. Gzgetc: Read the characters in the compressed file. Gzgets: the string in the compressed file. Gzgetss: Read the string in the compressed file and remove the HTML command. Gzopen: Open the compressed file. Gzpassthru: Extract all data after the pointer is decompressed. Gzputs: data is written into a compressed file. Gzread: reads a specified length string from a compressed file. Gzrewind: reset the pointer to the compressed file. Gzseek: Set the pointer of the compressed file to a specified position. Gztell: Get the pointer of the compressed file. Gzwrite: write data into a compressed file. Header: sends the HTTP header to the browser HexDec: hexadecimal to decimal. Htmlentities: converts all characters into HTML strings. Htmlspecialchars: convert special characters into HTML format. Hw_Children: obtains the subclass code. Hw_ChildrenObj: obtains the class record of the subclass. Hw_Close: Close the Hyperwave connection. Hw_Connect: connect to the Hyperwave server. Hw_Cp: Replication class. Hw_Del