Modes Description r Read only. Starts at the beginning of the file r+ Read/Write. Starts at the beginning of the file w Write only. Opens and clears the contents of file; or creates a new file if it doesn't exist w+ Read/Write. Opens and clears the contents of file; or creates a new file if it doesn't exist a Append. Opens and writes to the end of the file or creates a new file if it doesn't exist a+ Read/Append. Preserves file content by writing to the end of the file x Write only. Creates a new file. Returns FALSE and an error if file already exists x+ Read/Write. Creates a new file. Returns FALSE and an error if file already exists
Function	Description
basename()	Returns the filename component of a path
chgrp()	Changes the file group
chmod()	Changes the file mode
chown()	Changes the file owner
clearstatcache()	Clears the file status cache
copy()	Copies a file
delete()	See unlink() or unset()
dirname()	Returns the directory name component of a path
disk_free_space()	Returns the free space of a directory
disk_total_space()	Returns the total size of a directory
diskfreespace()	Alias of disk_free_space()
fclose()	Closes an open file
feof()	Tests for end-of-file on an open file
fflush()	Flushes buffered output to an open file
fgetc()	Returns a character from an open file
fgetcsv()	Parses a line from an open file, checking for CSV fields
fgets()	Returns a line from an open file
fgetss()	Returns a line, with HTML and PHP tags removed, from an open file
_file.asp">file()	Reads a file into an array
_file_exists.asp"> file_exists()	Checks whether or not a file or directory exists
file_get_contents()	Reads a file into a string
file_put_contents	Writes a string to a file
_fileatime.asp"> fileatime()	Returns the last access time of a file
_filectime.asp"> filectime()	Returns the last change time of a file
_filegroup.asp"> filegroup()	Returns the group ID of a file
_fileinode.asp"> fileinode()	Returns the inode number of a file
_filemtime.asp"> filemtime()	Returns the last modification time of a file
_fileowner.asp"> fileowner()	Returns the user ID (owner) of a file
_fileperms.asp"> fileperms()	Returns the permissions of a file
_filesize.asp">filesize()	Returns the file size
_filetype.asp">filetype()	Returns the file type
_flock.asp">flock()	Locks or releases a file
_fnmatch.asp">fnmatch()	Matches a filename or string against a specified pattern
_fopen.asp">fopen()	Opens a file or URL
_fpassthru.asp"> fpassthru()	Reads from an open file, until EOF, and writes the result to the output buffer
_fputcsv.asp">fputcsv()	Formats a line as CSV and writes it to an open file
_fputs.asp">fputs()	Alias of fwrite()
_fread.asp">fread()	Reads from an open file
_fscanf.asp">fscanf()	Parses input from an open file according to a specified format
_fseek.asp">fseek()	Seeks in an open file
_fstat.asp">fstat()	Returns information about an open file
_ftell.asp">ftell()	Returns the current position in an open file
_ftruncate.asp"> ftruncate()	Truncates an open file to a specified length
_fwrite.asp">fwrite()	Writes to an open file
_glob.asp">glob()	Returns an array of filenames / directories matching a specified pattern
_is_dir.asp">is_dir()	Checks whether a file is a directory
_is_executable.asp"> is_executable()	Checks whether a file is executable
_is_file.asp">is_file()	Checks whether a file is a regular file
_is_link.asp">is_link()	Checks whether a file is a link
_is_readable.asp"> is_readable()	Checks whether a file is readable
_is_uploaded_file.asp"> is_uploaded_file()	Checks whether a file was uploaded via HTTP POST
_is_writable.asp"> is_writable()	Checks whether a file is writeable
is_writeable()	Alias of is_writable()
link()	Creates a hard link
_linkinfo.asp">linkinfo()	Returns information about a hard link
_lstat.asp">lstat()	Returns information about a file or symbolic link
_mkdir.asp">mkdir()	Creates a directory
_move_uploaded_file.asp"> move_uploaded_file()	Moves an uploaded file to a new location
parse_ini_file()	Parses a configuration file
pathinfo()	Returns information about a file path
pclose()	Closes a pipe opened by popen()
popen()	Opens a pipe
readfile()	Reads a file and writes it to the output buffer
readlink()	Returns the target of a symbolic link
realpath()	Returns the absolute pathname
_rename.asp">rename()	Renames a file or directory
_rewind.asp">rewind()	Rewinds a file pointer
_rmdir.asp">rmdir()	Removes an empty directory
_set_file_buffer.asp"> set_file_buffer()	Sets the buffer size of an open file
_stat.asp">stat()	Returns information about a file
_symlink.asp">symlink()	Creates a symbolic link
_tempnam.asp">tempnam()	Creates a unique temporary file
_tmpfile.asp">tmpfile()	Creates a unique temporary file
_touch.asp">touch()	Sets access and modification time of a file
_umask.asp">umask()	Changes file permissions for files
_unlink.asp">unlink()	Deletes a file