String Functions

This section contains functions that work with strings.

Filesystem Security

Safe Mode restricts filesystem access only to files owned by the script owner, and you can use the open_basedir directive to specify the directory in which a file must reside. If you specify a directory,…

Placing a File s Contents into a Variable

Let's say that you want to put all of the content of a text file into a variable so that you can access it later. This is a good introduction to file access, because it shows all of the basic steps. Here's…

Working with Directories in PHP

PHP offers a very powerful set of directory-manipulation functions.

PHP Checking to See If a File Exists

fopen() generates error messages if you're trying to open a file that doesn't exist, as do other functions such as unlink(), when you attempt to delete a nonexistent file.