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  • 6.1 PHP Date and Time
  • 6.2 PHP Include Files
  • 6.3 PHP File Handling
  • 6.4 PHP File Open/Read
  • 6.5 PHP File Create/Write
  • 6.6 PHP File Upload
  • 6.7 PHP Cookies
  • 6.8 PHP Sessions
  • 6.9 PHP Filters
  • 6.10 PHP Filters Advanced
  • 6.11 PHP Callback Functions
  • 6.12 PHP JSON
  • 6.13 PHP Exceptions
    •
  • 1.1 PHP Intro
  • 1.2 PHP Install
  • 1.3 PHP Syntax
  • 1.4 PHP Comments
  • 1.5 PHP Variables
  • 1.5.1 Variables Scope
  • 1.6 PHP Echo / Print
    •
  • 2.1 PHP Data Types
  • 2.2 PHP Strings
  • 2.3 PHP Numbers
  • 2.4 PHP Math
  • 2.5 PHP Constants
  • 2.6 PHP Casting
  • 2.7 PHP Magic Constants
    •
  • 3.1 PHP Operators
  • 3.2 PHP If Else Elseif
  • 3.3 PHP Switch
  • 3.4 PHP Loops
  • 3.4.1 While Loop
  • 3.4.2 Do While Loop
  • 3.4.3 For Loop
  • 3.4.4 Foreach Loop
  • 3.4.5 Break/Continue
  • 3.5 PHP Functions
    •
  • 4.1 PHP Arrays
  • 4.1.1 Indexed Arrays
  • 4.1.2 Associative Arrays
  • 4.1.3 Multidimensional Arrays
  • 4.1.4 Sorting Arrays
  • 4.2 PHP Superglobals
  • 4.2.1 $GLOBALS
  • 4.2.2 $_SERVER
  • 4.2.3 $_REQUEST
  • 4.2.4 $_POST
  • 4.2.5 $_GET
  • 4.3 PHP RegEx
    •
  • 5.1 PHP Form Handling
  • 5.2 PHP Form Validation
  • 5.3 PHP Form Required
  • 5.4 PHP Form URL / E-mail
  • 5.5 PHP Form Complete
    •
  • 6.1 PHP Date and Time
  • 6.2 PHP Include Files
  • 6.3 PHP File Handling
  • 6.4 PHP File Open/Read
  • 6.5 PHP File Create/Write
  • 6.6 PHP File Upload
  • 6.7 PHP Cookies
  • 6.8 PHP Sessions
  • 6.9 PHP Filters
  • 6.10 PHP Filters Advanced
  • 6.11 PHP Callback Functions
  • 6.12 PHP JSON
  • 6.13 PHP Exceptions
    •
  • 7.1 PHP What is OOP
  • 7.2 PHP Classes / Objects
  • 7.3 PHP Constructor
  • 7.4 PHP Destructor
  • 7.5 PHP Access Modifiers
  • 7.6 PHP Inheritance
  • 7.7 PHP Class Constants
  • 7.8 PHP Abstract Classes
  • 7.9 PHP Interfaces
  • 7.10 PHP Traits
  • 7.11 PHP Static Methods
  • 7.12 PHP Static Properties
  • 7.13 PHP Namespaces
  • 7.14 PHP Iterables
    •
  • 8.1 MySQL Database
  • 8.2 MySQL Connect
  • 8.3 MySQL Create DB
  • 8.4 MySQL Create Table
  • 8.5 MySQL Insert Data
  • 8.6 MySQL Get Last ID
  • 8.7 MySQL Insert Multiple
  • 8.8 MySQL Prepared
  • 8.9 MySQL Select Data
  • 8.10 MySQL Where
  • 8.11 MySQL Order By
  • 8.12 MySQL Delete Data
  • 8.13 MySQL Update Data
  • 8.14 MySQL Limit Data
    •
  • 9.1 PHP XML Parsers
  • 9.2 PHP SimpleXML Parser
  • 9.3 PHP SimpleXML - Get
  • 9.4 PHP XML Expat
  • 9.5 PHP XML DOM
    •
  • 10.1 AJAX Intro
  • 10.2 AJAX PHP
  • 10.3 AJAX Database
  • 10.4 AJAX XML
  • 10.5 AJAX Live Search
  • 10.6 AJAX Poll
  • My Poll
    •

    • 6.3 PHP File Handling

    File handling is an important part of any web application. You often need to open and process a file for different tasks.

    PHP Manipulating Files

    • PHP has several functions for creating, reading, uploading, and editing files.
    • Be careful when manipulating files!
    • When you are manipulating files you must be very careful.
    • You can do a lot of damage if you do something wrong. Common errors are: editing the wrong file, filling a hard-drive with garbage data, and deleting the content of a file by accident.

    PHP readfile() Function

    • The readfile() function reads a file and writes it to the output buffer.
    • Assume we have a text file called "webdictionary.txt", stored on the server, that looks like this:
    AJAX = Asynchronous JavaScript and XML
CSS = Cascading Style Sheets
HTML = Hyper Text Markup Language
PHP = PHP Hypertext Preprocessor
SQL = Structured Query Language
SVG = Scalable Vector Graphics
XML = EXtensible Markup Language

    The PHP code to read the file and write it to the output buffer is as follows (the readfile() function returns the number of bytes read on success):

    Example: PHP File Handling - PHP readfile() Function
    <?php
echo readfile("include/Module6Quiz.txt");
?>
    • The readfile() function is useful if all you want to do is open up a file and read its contents.
    • The next chapters will teach you more about file handling.

    The value of i is: 20

    PHP Fundamentals course home
    Module 6. PHP Advanced

    Navigate this module
  • 6.1 PHP Date and Time
  • 6.2 PHP Include Files
  • 6.3 PHP File Handling
  • 6.4 PHP File Open/Read
  • 6.5 PHP File Create/Write
  • 6.6 PHP File Upload
  • 6.7 PHP Cookies
  • 6.8 PHP Sessions
  • 6.9 PHP Filters
  • 6.10 PHP Filters Advanced
  • 6.11 PHP Callback Functions
  • 6.12 PHP JSON
  • 6.13 PHP Exceptions
    •

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    Module 6 quiz

    Example files created in this module:
    The PHP Date() Function - Get a Date The PHP Date() Function - Automatic Copyright Year The PHP Date() Function - Get a Time The PHP Date() Function - Get Your Time Zone The PHP Date() Function - Create a Date With mktime() The PHP Date() Function - Create a Date From a String With strtotime() part 1 The PHP Date() Function - Create a Date From a String With strtotime()part 2 The PHP Date() Function - Create Dates From Strings With strtotime() The PHP Date() Function - Count The Number of Days To July 4 With strtotime() PHP Include Files - PHP include Example part 1 PHP Include Files - PHP include Example part 2 PHP Include Files - PHP include Example part 3 PHP Include Files - PHP include Example part 4 PHP Include Files - PHP require Example readfile() fopen() fgets() feof() fgetc() PHP File Handling - PHP readfile() Function PHP File Open/Read - PHP Open File - fopen() PHP File Open/Read - fgets() Read Single Line PHP File Open/Read - feof() Check End-Of-File PHP File Open/Read - fgetc() Read Single Character PHP File Upload PHP Cookies - Create/Retrieve a Cookie PHP Cookies - Modify a Cookie Value PHP Cookies - Delete a Cookie PHP Cookies - Check if Cookies are Enabled PHP Sessions - Start a PHP Session PHP Sessions - Get PHP Session Variable Values part 1 PHP Sessions - Get PHP Session Variable Values part 2 PHP Sessions - Modify a PHP Session Variable PHP Sessions - Destroy a PHP Session PHP Filters - The PHP Filter Extension PHP Filters - Sanitize a String PHP Filters - Validate an Integer PHP Filters - filter_var() and Problem With 0 PHP Filters - Validate an IP Address PHP Filters - Sanitize and Validate an Email Address PHP Filters - Sanitize and Validate a URL PHP Filters Advanced - Validate an Integer Within a Range PHP Filters Advanced - Validate IPv6 Address PHP Filters Advanced - Validate URL That Must Contain QueryString PHP Filters Advanced - Remove Characters With ASCII Value > 127 PHP Callback Functions PHP Callback Functions - Anonymous Function PHP Callback Functions - Callbacks in User Defined Functions PHP and JSON - json_encode() part 1 PHP and JSON - json_encode() part 2 PHP and JSON - json_decode() part 1 PHP and JSON - json_decode() part 2 PHP and JSON - Accessing the Decoded Values part 1 PHP and JSON - Accessing the Decoded Values part 2 PHP and JSON - Looping Through the Values part 1 PHP and JSON - Looping Through the Values part 2 PHP Exceptions - Throwing an Exception PHP Exceptions - The try...catch Statement PHP Exceptions - The try...catch...finally Statement part 1 PHP Exceptions - The try...catch...finally Statement part 2 PHP Exceptions - The Exception Object