Usually, files are opened (or searched) relative to the path of the document. To be sure that you are searching for the current script’s path, you can use a two-step approach: The constant __FILE__ contains the full path of the current script, and the function dirname() determines the directory name portion of a path.
Let’s create a compressed Zip archive in PHP with ZipArchive class, which provides many features for reading and writing Zip archives.
How to compress files in PHP with compress.zlib:// and compress.bzip2:// streams (and with gzopen() and bzopen()).
How to use DirectoryIterator and RecursiveDirectoryIterator classes to loop through all files and folders inside a directory.
How to browse the file system with the help of PHP functions.
Learn how to rename, move, copy or delete files in PHP.
Learn how to get all file information, for example, get modification time with filemtime(), get last access time with fileatime(), get group id with filegroup(), get user id with fileowner(), get size with filesize() and use the stat() function to get all information (meta data) about a file.
Learn how to use the is_executable(), is_readable(), is_writable(), fileperms(), and chmod() functions to determine whether your PHP script has permission to execute, read or write a particular file.
How to check the type of a file. For example, check whether the provided file name is a directory, a file, or a symbolic link.
Let’s write the PHP configuration information, such as the database host and user credentials, in an INI file. Then use the parse_ini_file() function to parse this information in your web application.