This document discusses file handling in PHP. It covers opening, reading, and writing to files, as well as manipulating directories. Some key points covered include using fopen() and fclose() to open and close files, fgets() and fread() to read file data, fwrite() to write data to files, and opendir(), readdir(), and closedir() to open directories and read directory contents.

1. File Handling with PHP

4. File Open Modes ‘ r’ Open for reading only. Start at beginning of file. ‘ r+’ Open for reading and writing. Start at beginning of file. ‘ w’ Open for writing only. Remove all previous content, if file doesn’t exist, create it. ‘ a’ Open writing, but start at END of current content. ‘ a+’ Open for reading and writing, start at END and create file if necessary.