The filesystem functions are used to access and manipulate the filesystem PHP provides you all the posible functions you may need to manipulate a file.
Installation:
The error and logging functions are part of the PHP core. There is no installation needed to use these functions.
Runtime Configuration:
The behaviour of these functions is affected by settings in php.ini.
| Name | Default | Changeable | Changelog |
|---|---|---|---|
| allow_url_fopen | "1" | PHP_INI_ALL | PHP_INI_ALL in PHP <= 4.3.4. PHP_INI_SYSTEM in PHP < 6. Available since PHP 4.0.4. |
| allow_url_include | "0" | PHP_INI_ALL | PHP_INI_SYSTEM in PHP 5. Available since PHP 5.2.0. |
| user_agent | NULL | PHP_INI_ALL | Available since PHP 4.0.3. |
| default_socket_timeout | "60" | PHP_INI_ALL | Available since PHP 4.3.0. |
| from | "" | PHP_INI_ALL | |
| auto_detect_line_endings | "0" | PHP_INI_ALL | Available since PHP 4.3.0. |
PHP Error and Logging Constants:
PHP: indicates the earliest version of PHP that supports the constant.
You can use any of the constant while configuring your php.ini file.
| Constant | Description | PHP |
|---|---|---|
| GLOB_BRACE | ||
| GLOB_ONLYDIR | ||
| GLOB_MARK | ||
| GLOB_NOSORT | ||
| GLOB_NOCHECK | ||
| GLOB_NOESCAPE | ||
| PATHINFO_DIRNAME | ||
| PATHINFO_BASENAME | ||
| PATHINFO_EXTENSION | ||
| PATHINFO_FILENAME | 5.2.0 | |
| FILE_USE_INCLUDE_PATH | Search for filename in include_path | 5.0.0 |
| FILE_APPEND | Append content to existing file. | |
| FILE_IGNORE_NEW_LINES | Strip EOL characters | 5.0.0 |
| FILE_SKIP_EMPTY_LINES | Skip empty lines | 5.0.0 |
| FILE_BINARY | Binary mode | 6.0.0 |
| FILE_TEXT | Text mode | 6.0.0 |
List of Functions
PHP: indicates the earliest version of PHP that supports the function.
| Function | Description | PHP |
|---|---|---|
| basename() | Returns filename component of path | 3 |
| chgrp() | Changes file group | 3 |
| chmod() | Changes file mode | 3 |
| chown() | Changes file owner | 3 |
| clearstatcache() | Clears file status cache | 3 |
| copy() | Copies file | 3 |
| delete() | Deletes file | |
| dirname() | Returns directory name component of path | 3 |
| disk_free_space() | Returns available space in directory | 4.0.7 |
| disk_total_space() | Returns the total size of a directory | 4.0.7 |
| diskfreespace() | Alias of disk_free_space() | 4.0.7 |
| fclose() | Closes an open file pointer | 3 |
| feof() | Tests for end-of-file on a file pointer | 3 |
| fflush() | Flushes the output to a file | 4 |
| fgetc() | Gets character from file pointer | 3 |
| fgetcsv() | Gets line from file pointer and parse for CSV fields | 3 |
| fgets() | Gets line from file pointer | 3 |
| fgetss() | Gets line from file pointer and strip HTML tags | 3 |
| file_exists() | Checks whether a file or directory exists | 3 |
| file_get_contents() | Reads entire file into a string | 4.3.0 |
| file_put_contents() | Write a string to a file | 5 |
| file() | Reads entire file into an array | 3 |
| fileatime() | Gets last access time of file | 3 |
| filectime() | Gets inode change time of file | 3 |
| filegroup() | Gets file group | 3 |
| fileinode() | Gets file inode | 3 |
| filemtime() | Gets file modification time | 3 |
| fileowner() | Gets file owner | 3 |
| fileperms() | Gets file permissions | 3 |
| filesize() | Gets file size | 3 |
| filetype() | Gets file type | 3 |
| flock() | Portable advisory file locking | 3 |
| fnmatch() | Match filename against a pattern | 4.0.3 |
| fopen() | Opens file or URL | 3 |
| fpassthru() | Output all remaining data on a file pointer | 3 |
| fputcsv() | Format line as CSV and write to file pointer | 5.1.0 |
| fputs() | Alias of fwrite() | 3 |
| fread() | Binary-safe file read | 3 |
| fscanf() | Parses input from a file according to a format | 4.0.1 |
| fseek() | Seeks on a file pointer | 3 |
| fstat() | Gets information about a file using an open file pointer | 4 |
| ftell() | Tells file pointer read/write position | 3 |
| ftruncate() | Truncates a file to a given length | 4 |
| fwrite() | Binary-safe file write | 3 |
| glob() | Find pathnames matching a pattern | 4.0.3 |
| is_dir() | Tells whether the filename is a directory | 3 |
| is_executable() | Tells whether the filename is executable | 3 |
| is_file() | Tells whether the filename is a regular file | 3 |
| is_link() | Tells whether the filename is a symbolic link | 3 |
| is_readable() | Tells whether the filename is readable | 3 |
| is_uploaded_file() | Tells whether the file was uploaded via HTTP POST | 4.0.3 |
| is_writable() | Tells whether the filename is writable | 3 |
| is_writeable() | Alias of is_writable() | 3 |
| lchgrp() | Changes group ownership of symlink | 5.1.2 |
| lchown() | Changes user ownership of symlink | 5.1.2 |
| link() | Create a hard link | 3 |
| linkinfo() | Gets information about a link | 3 |
| lstat() | Gives information about a file or symbolic link | 3 |
| mkdir() | Makes directory | 3 |
| move_uploaded_file() | Moves an uploaded file to a new location | 4.0.3 |
| parse_ini_file() | Parse a configuration file | 4 |
| pathinfo() | Returns information about a file path | 4.0.3 |
| pclose() | Closes process file pointer | 3 |
| popen() | Opens process file pointer | 3 |
| readfile() | Outputs a file | 3 |
| readlink() | Returns the target of a symbolic link | 3 |
| realpath() | Returns canonicalized absolute pathname | 4 |
| rename() | Renames a file or directory | 3 |
| rewind() | Rewind the position of a file pointer | 3 |
| rmdir() | Removes directory | 3 |
| set_file_buffer() | Alias of stream_set_write_buffer() | 3 |
| stat() | Gives information about a file | 3 |
| symlink() | Creates a symbolic link | 3 |
| tempnam() | Create file with unique file name | 3 |
| tmpfile() | Creates a temporary file | 3 |
| touch() | Sets access and modification time of file | 3 |
| umask() | Changes the current umask | 3 |
| unlink() | Deletes a file | 3 |
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