PHP Tutorials - Herong's Tutorial Examples - v5.17, by Herong Yang
opendir() and Directory Management Functions
This section describes opendir() and other directory management functions. A tutorial example is provided on how to open a directory as a directory resource handle and read its entries with the readdir() function in a loop.
PHP offers the following built-in functions to manage directories of file systems:
To show you how to use some of these functions should be used, I wrote this simple script:
<?php # OpendirTest.php #- Copyright 2003 (c) HerongYang.com. All Rights Reserved. # $path = "/php"; print "\n First 10 entries in $path:\n"; $dir = opendir($path); $i = 0; while (FALSE !== ($entry = readdir($dir)) && $i<10) { $i++; print " $entry\n"; } print "\n First 10 entries in $path again:\n"; $dir = dir($path); $i = 0; while (FALSE !== ($entry = $dir->read()) && $i<10) { $i++; print " $entry\n"; } ?>
If you run this script, you should get:
First 10 entries in /php: . .. deplister.exe dev ext extras glib-2.dll gmodule-2.dll icudt63.dll icuin63.dll First 10 entries in /php again: . .. deplister.exe dev ext extras glib-2.dll gmodule-2.dll icudt63.dll icuin63.dll
Table of Contents
Introduction and Installation of PHP
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
Interface with Operating System
Introduction of Class and Object
Integrating PHP with Apache Web Server
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
►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
ShowPhoto.php - Simple Slid Show Script
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
Parsing and Managing HTML Documents
Configuring and Sending Out Emails
Managing PHP Engine and Modules on macOS