Quick reference to the filesystem functions of PHP.
| Function | Returns | Does what |
|---|---|---|
| chdir(dir) | Boolean | Makes "dir" the current working directory |
| closedir([dir_handle]) | Nothing | Closes "dir_handle" directory or cwd |
| dir(dir [, context]) | Object | Returns object representation of "dir" |
| getcwd() | String | Returns name of cwd (current working directory) |
| opendir(path [, context]) | Integer | Opens "path" and returns dir_handle for it |
| readdir([dir_handle]) | String | Returns next name in "dir_handle" directory or cwd |
| rewinddir([dir_handle]) | Nothing | Makes "dir_handle" or cwd point to beginning of directory |
| scandir(dir [, sort order [, context]) | Array | Lists contents of "dir". Default ascending ("0-9"). |
| dirname(path) | String | Returns directory name from "path" |
| disk_free_space(dir) | Float | Returns free space in "dir" filesystem |
| disk_total_space(dir) | Float | Returns total volume of "dir" filesystem |
| is_dir(filename) | Boolean | Returns true if "filename" is a directory |
| mkdir(path, [, mode [, recursive [, context]]]) | Boolean | Creates directory at "path". Mode default 0777 |
| rmdir(dir [, context]) | Boolean | Deletes directory "dir" |
| Function | Returns | Does what |
|---|---|---|
| basename(path [, suffix]) | String | Returns filename from "path" |
| chgrp(file, group) | Integer | Changes "group" for "file" |
| chmod(file, mode) | Integer | Changes "mode" for "file" |
| chown(file, user) | Boolean | Makes "user" the owner of "file" |
| clearstatcache([clear_realpath [, file]]) | Nothing | Clears file stat cache |
| copy(from, to [, context]) | Boolean | Copies file "from", "to" |
| fclose(handle) | Boolean | Closes the file with "handle" |
| feof(handle) | Boolean | Returns true on eof for file with "handle" |
| fgetc(handle) | String | Returns next character from file with "handle" |
| fgetcsv(handle [, length [, delimiter [, enclosure [, escape]]]]) | Array | Returns next line as array from file with "handle" |
| fgets(handle [, length]) | String | Reads line of "length" (-1 byte) from file with "handle" |
| fgetss(handle [, length [, tags]) | String | As fgets(), but removes PHP+HTML tags not in "tags" |
| file(file [, flags [, context]]) | Array | Creates array from "file", each line an element |
| file_exists(file) | Boolean | Returns true if "file" exists |
| file_get_contents(file [, use_inc_path [, context [, offset [, maxlen ]]]] ) | String | Creates string from "file", from "offset" up to "maxlen" bytes |
| file_put_contents(file, data [, flags [, context]]) | Integer | Writes "data" to "file" |
| fileatime(file) | Integer | Returns time of last access for "file" |
| filectime(file) | Integer | Returns time of last change for "file" |
| filemtime(file) | Integer | Returns time of last change for "file" |
| filegroup(file) | Integer | Returns group ID for "file" owner |
| fileinode(file) | Integer | Returns inode number for "file" |
| fileowner(file) | Integer | Returns ID of "file" owner |
| fileperms(file) | Integer | Returns permissions for "file" |
| filesize(file) | Integer | Returns size of "file" |
| filetype(file) | String | Returns type of "file" |
| flock(handle, operation [, wouldblock]) | Boolean | Sets/removes lock on file with "handle" |
| fopen(file, mode [, use_inc_path [, context]]) | Integer | Opens "file", returns handle |
| fpassthru(handle) | Integer | Outputs (rest of) file with "handle" |
| fputs(handle, string [, length]) | Integer | Writes "string" up to "length" chracters to file with "handle" |
| fwrite(handle, string [, length]) | Integer | Writes "string" up to "length" characters to file with "handle" |
| fread(handle, length) | String | Reads "length" characters from file with "handle" |
| fscanf(handle, format [, ...]) | Mixed | Parses input with "format" from file with "handle" |
| fseek(handle , offset [, whence]) | Integer | Moves internal file pointer "offset" from "whence" |
| fstat(handle) | Array | Returns array of information about file with "handle" |
| ftell(handle) | Integer | Returns position of internal file pointer |
| ftruncate(handle, size) | Boolean | Reduces file with "handle" to "size" (truncates) |
| highlight_file(file [, return]) | Nothing | Prints out syntax highlighted code of "file" |
| show_source(file) | Nothing | Prints out syntax highlighted code of "file" |
| is_executable(file) | Boolean | Returns true if "file" is executable |
| is_file(file) | Boolean | Returns true if "file" is a file |
| is_link(file) | Boolean | Returns true if "file" is a symlink |
| is_readable(file) | Boolean | Returns true if "file" is readable |
| is_writable(file) | Boolean | Returns true if "file" is writeable |
| is_writeable(file) | Boolean | Returns true if "file" is writeable |
| is_uploaded_file(file) | Boolean | Returns true if "file" was uploaded with POST |
| link(target, link) | Boolean | Creates hard link |
| linkinfo(path) | Integer | Returns information about link to "path" |
| pathinfo(path [, options]) | Mixed | Returns information about "path" |
| lstat(file) | Array | Returns information about "file" or symlink |
| move_uploaded_file(file, destination) | Boolean | Moves uploaded "file" to "destination" |
| pclose(handle) | Integer | Closes "handle" to pipe opened with popen() |
| popen(command, mode) | Integer | Opens pipe by forking "command". Returns handle |
| readfile(file [, use_inc_path [, context]]) | Integer | Reads and outputs "file" |
| readlink(path) | String | Returns target of symlink |
| realpath(path) | String | Returns canonicalized "path" |
| rename(file, new_name [, context]) | Boolean | Renames "file" to "new_name" |
| rewind(handle) | Boolean | Makes "handle" point to beginning of file |
| set_file_buffer(handle, bytes) | Integer | Set write file buffer size to "bytes" |
| stream_set_write_buffer(handle, bytes) | Integer | Set write file buffer size to "bytes" |
| stat(file) | Array | Returns information about "file" |
| symlink(file, link) | Boolean | Creates "link" symlink to "file" |
| tempnam(directory, prefix) | String | Creates unique temporary filename in "directory" |
| tmpfile() | Integer | Creates temporary file, returns handle |
| touch(file [, time]) | Boolean | Marks "file" as modified on "time" |
| umask([mask]) | Integer | Changes current umask to "mask". Default 0777 |
| unlink(file [, context]) | Boolean | Deletes "file" |
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