Functions to Manage Directories, Files and Images
This chapter provides tutorial examples and notes about functions to manage directories, files, and images. Topics include directory management functions like mkdir(), file testing functions like is_file(), file input and output functions like fopen(), image file management functions like imagecreatefromgif().
opendir() and Directory Management Functions
file_exists() and File Testing Functions
FileExistsTest.php - File Testing Examples
fopen() and File Input/Output Functions
File_Input_Output_Test.php - File Input/Output Examples
readfile() and Special File Handling Functions
imagecreatetruecolor() and GD Imaging Library Functions
ShowPhoto.php - Simple Slid Show Script
- PHP supports directory management functions similar to Unix commands like chdir(), mkdir() and rmdir().
- To navigate through the directory tree, you can use opendir() and is_dir() functions.
- To obtain detailed information about a file, you can use the stat() function.
- To read data from a file, you can use fopen() and fread() functions.
- To write data to a file, you can use fopen() and fwrite() functions.
- To read image from a GIF file, you can use the imagecreatefromgif() function.
Table of Contents
About This Book
Introduction and Installation of PHP 7.0
PHP Script File Syntax
PHP Data Types and Data Literals
Variables, References, and Constants
Expressions, Operations and Type Conversions
Conditional Statements - "if" and "switch"
Loop Statements - "while", "for", and "do ... while"
Function Declaration, Arguments, and Return Values
Arrays - Ordered Maps
Configuring and Sending out Emails
Retrieving Information from HTTP Requests
Creating and Managing Sessions in PHP Scripts
Sending and Receiving Cookies in PHP Scripts
Controlling HTTP Response Header Lines in PHP Scripts
MySQL Server Connection and Access Functions
►Functions to Manage Directories, Files and Images
SOAP Extension Function and Calling Web Services
SOAP Server Functions and Examples
Localization Overview of Web Applications
Using Non-ASCII Characters in HTML Documents
Using Non-ASCII Characters as PHP Script String Literals
Receiving Non-ASCII Characters from Input Forms
"mbstring" Extension and Non-ASCII Encoding Management
Managing Non-ASCII Character Strings with MySQL Servers
Introduction of Class and Object
Integrating PHP with Apache Web Server
PDF Printing Version