File_Input_Output_Test.php - File Input/Output Examples

This section provides a tutorial example script on how to use file input and output functions like fopen(), fread(), fwrite(), and fclose(). The example script copies any file in binary mode.

To show you how to use some of those file testing functions described in the previous section, I wrote this simple script:

<?php # File_Input_Output_Test.php
#- Copyright (c) 2015, HerongYang.com, All Rights Reserved.
#
   if (count($argv) > 1) {
      $path = $argv[1];
   } else {
      print("\n Please specify a file path name.\n");
      exit();
   }

   if (file_exists($path)) {
      print("\n Good. $path does exists!.\n");

      if (is_file($path)) {
         print("\n Very good. $path is a file.\n");

         print("\n Starting to copy $path to $path.bck...\n");
         $input = fopen($path,"rb"); # For binary read
         $output = fopen($path.".bck","wb"); # For binary write
         $inCount = 0;
         $outCount = 0;
         while (!feof($input)) {
            $buffer = fread($input,1024);
            $inCount += strlen($buffer);
            $outCount += fwrite($output,$buffer);
         }
         fclose($input);
         fclose($output);

         print("   # of bytes read: $inCount\n");
         print("   # of bytes write: $outCount\n");
      } else {
         print("\n Too bad. $path is not a file.\n");
         exit();
      }
   } else {
      print("\n Bad. $path does not exists!.\n");
      exit();
   }
?>

If you run this sample script with different path names, you should get:

cd \herong\php

C:\herong\php>\php\php File_Input_Output_Test.php \php\php.exe

 Good. \php\php.exe does exists!.

 Very good. \php\php.exe is a file.

 Starting to copy \php\php.exe to \php\php.exe.bck...
   # of bytes read: 32821
   # of bytes write: 32821


C:\herong\php>\php\php File_Input_Output_Test.php \php

 Good. \php does exists!.

 Too bad. \php is not a file.

Last update: 2015.

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

 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

 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

 Outdated Tutorials

 References

 PDF Printing Version