The file manipulation functions in PHP3.0 are broadly similar to those of C, but there are some extensions, especially in addition to supporting
Access to native files is also supported for HTTP and FTP URLs, as long as the URLs are passed as filenames to the file manipulation function.
The main file manipulation functions are:
(1) fclose, feof, fgetc, Fgets, fopen, fputs, Fseek, Ftell, mkdir, Readlink, rename, rewind, rmdir, stat, unlink
These functions are similar to the functions of the same name in the C language.
(2) Chgrp, chmod, chown, copy
The meanings of these functions are also easy to understand:
Chgrp (file name, group);
chmod (file name, mode);
Chown (file name, user);
Copy (source file name, target file name);
It is important to note that these functions use filenames instead of the file numbers returned by fopen.
(3) file_exists, Fileatime, Filectime, filegroup, Fileinode, Filemtime, Fileowner, filesize, filetype, fileperms, Fileumask, Is_dir, is_executable, Is_file, Is_link, is_readable, is_writeable
These are file information functions, most of which accept a file name as a parameter.
(4) FGETSS
Usage:
FGETSS (file number, maximum length);
Reads a line of files or until the maximum length (similar to fgets), but removes all HTML and PHP tags.
(5) file
Usage:
File (file name);
Returns an array with each element being a row in the file.
(6) Tempnam
Usage:
Tempnam (directory name, prefix);
Returns a temporary file name.
(7) basename, dirname
Gets the file name part and the directory name part of the path to the files. Under Windows systems, both "/" and "" can be used as directory separators, and only "/" is available under other systems.
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