This is a basic PHP program which describes How to get the number of days of the current month. Below examples will help you in the better understanding of the basic concept of PHP programming language.
The Filesystem functions allow us to manipulate the folders & files from the particular directory.
Below is the complete list of PHP 5 functions which are used for filesystem management.
| PHP Function | Description |
| basename() | Returns the filename |
| chgrp() | Change the file group |
| chmod() | Change the file permission |
| chown() | Change the file ownership |
| clearstatcache() | Clears the file status cache |
| copy() | Copies a file |
| dirname() | Returns the directory name component of a path |
| disk_free_space() | Returns the free space of a directory |
| disk_total_space() | Returns the directory size |
| 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() | Reads a file into an array |
| 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() | Returns the last access time of a file |
| filectime() | Returns the last change time of a file |
| filegroup() | Returns the group ID of a file |
| fileinode() | Returns the inode number of a file |
| filemtime() | Returns the last modification time of a file |
| fileowner() | Returns the user ID (owner) of a file |
| fileperms() | Returns the permissions of a file |
| filesize() | Returns the file size |
| filetype() | Returns the file type |
| flock() | Locks or releases a file |
| fnmatch() | Matches a filename or string against a specified pattern |
| fopen() | Opens a file or URL |
| fpassthru() | Reads from an open file, until EOF, and writes the result to the output buffer |
| fputcsv() | Formats a line as CSV and writes it to an open file |
| fputs() | Alias of fwrite() |
| fread() | Reads from an open file |
| fscanf() | Parses input from an open file according to a specified format |
| fseek() | Seeks in an open file |
| fstat() | Returns information about an open file |
| ftell() | Returns the current position in an open file |
| ftruncate() | Truncates an open file to a specified length |
| fwrite() | Writes to an open file |
| glob() | Returns an array of filenames / directories matching a specified pattern |
| is_dir() | Checks whether a file is a directory |
| is_executable() | Checks whether a file is executable |
| is_file() | Checks whether a file is a regular file |
| is_link() | Checks whether a file is a link |
| is_readable() | Checks whether a file is readable |
| is_uploaded_file() | Checks whether a file was uploaded via HTTP POST |
| is_writable() | Checks whether a file is writeable |
| is_writeable() | Alias of is_writable() |
| lchgrp() | Changes group ownership of symlink |
| lchown() | Changes user ownership of symlink |
| link() | Creates a hard link |
| linkinfo() | Returns hard link information |
| lstat() | Returns symbolic link information |
| mkdir() | Creates a directory |
| move_uploaded_file() | Moves an uploaded file |
| parse_ini_file() | Parses a configuration file |
| parse_ini_string() | Parses a configuration string |
| pathinfo() | Returns file path information |
| pclose() | Closes a pipe |
| popen() | Opens a pipe |
| readfile() | Reads and writes a file |
| readlink() | Returns symbolic target link |
| realpath() | Returns the absolute pathname |
| realpath_cache_get() | Returns realpath cache entries |
| realpath_cache_size() | Returns realpath cache size |
| rename() | Renames a file or directory |
| rewind() | Rewinds a file pointer |
| rmdir() | Removes an empty directory |
| set_file_buffer() | Sets the buffer size of an open file |
| stat() | Returns information about a file |
| symlink() | Creates a symbolic link |
| tempnam() | Creates a unique temporary file |
| tmpfile() | Creates a unique temporary file |
| touch() | Sets access and modification time of a file |
| umask() | Changes file permissions for files |
| unlink() | Deletes a file |
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